You did a great job outlining a difficult situation, and it sounds to me like you have a good head on your shoulders. An alcoholic head, sure, or meetings might not click for you the way they do, but a good one none-the-less.
You already have your answer, C -- and you know it. And while I do not think God gives us "lessons" like some pinch lipped prarie school marm, I do believe that we are presented with situations which are actually opportunities to do what we need to so we can grow as we're meant to. So this: "My sponsor has offered to ask one of his friends to speak with him, but I think I have to do it myself" positively shouts to me that the Little Voice inside we all strive to tune in to is, in this case, being received loud and clear by you.
I have some specific suggestions (of course!) and some things you might want to consider (don't I always!).
This guy is in the wrong. What he is doing is absolutely not good AA -- bad for you -- and terrible for him Ultimately the harm he does himself in this is far greater -- but there's no fool like an old fool. In no way am I minimizing your uncomfortability or what is clearly a level of attention that has mixed and murky motives, but it's worth reminding ourselves that people can be chatty and social on the outside and very lonely inside. While it's possible for any person to be blind to their real motives, alcoholics are especially skilled at "hiding a bad motive under a good one" as it says in the 12&12 -- and quite often hiding them from ourselves, first. Life is rarely a Lifetime movie, and one sorry, besotted old fool does not a full-on stalker/predator make. (Yes, I know it could make one. But that doesn't mean it will make one.)
So if you try and bring some compassion to bear in how you view him and what he's doing -- and this is NOT an excuse for him, merely something to consider -- seeing these actions as born of loneliness and fear might help you in speaking up to him and drawing some boundaries. I understand fear because I have dealt with it so much -- thus, when I need to deal with someone who at first makes me uncomfortable, if I can identify what about their behavior is driven by their fear, it makes approaching them a little easier, as they go from kind of scary-bad to a little sorry-sad.
I don't see any error on your part when it comes to him having your phone number or you not being quick to return his gift. Dear God, girl, you're a walking miracle, in the beginning of your sobriety, going to meetings and trying to build a foundation in recovery! A little foot dragging on something that would be difficult for anyone to handle is completely natural.
But... now you are clear in what you need to do. You need to return the gift and tell him that the level of attention he is showing you is not okay with you.
The time for the dragging of the feet is over.
So you bring the jewelery to the meeting and tell him you need to speak to him. No more dithering about when you're going to do it or how to meet him. Part of the problem is he's around more than you want. Meeting him is hardly the issue.
You return the gift and you say "Thank you, but I cannot and I will not accept this gift. It is too much and I am not at all comfortable keeping it." Rehearse it a couple of times so you can say it with some force. Gentle force, but force. No err or um between the words and no apology in your tone. When he tries to insist you keep it just play the broken record and repeat it until he "gets" it. And if he doesn't, then set the gift on a chair or table and let it go. If it becomes a game of "I won't take it so you have to keep it" just opt out, and set it down.
And now comes the leap of faith. One of the best things I learned in AA was that the truth will protect you.
So tell him the truth.
"I'm not comfortable with the amount of attention you're giving me. All the texts, all the waiting for me after meetings -- it's starting to affect my comfortability in the rooms. I know the hand of AA will always be there for me, but as far as 12th step work goes, I need it to be a woman's hand for right now."
Yes, you feel anxiety over saying this, but it will be fantastic for you if you take a deep breath and do it.
You don't have to do it alone. Ask your sponsor to be there, as quiet support, if you like -- or some other gal in the rooms. Ask them to let you be the one talking, you're not asking them to speak for you, just to be there -- or nearby even -- as moral support.
And, as they told me when facing a scary situation, bring God with you. God will give you the words and handle this interaction if you invite God into it. Remember, this guy has a Higher Power too. He may be embarrassed or angry or confused. He might feel this way or that. None of that is your problem. This is your opportunity, not your lesson and not your problem: To speak up for yourself in an environment which it is safe to do so and with ready support at hand.
Just because AA's can be a huggy group doesn't mean you are required to hug everyone -- or anyone. Just hold up one hand when someone comes in to give you a hug and say "wait. I'm in a handshaking place today."
If some people are offended or give you flack, that's on them. Most people will not. And you can hug some and not others.
Claim your Home Group, claim your meeting, as yours. (Not yours exclusively, obviously, but yours for sure.)
There will be some anxiety. Some awkwardness at times for a bit, too.
But your sobriety, your life, is more important than his -- or anyone's -- feelings.
You can do this with grace and do this well. It's the right thing for you to do, and his unwanted attention has in some ways made him a great spiritual teacher for you.
C., if you can stay sober for as many days as you have then there is nothing in this you can't handle. You don't have to rely on your own power -- just rely on your Higher Power and all will go as it should.
Faith. Courage -- I know it's a lot easier for me to rattle these things off than it is to look someone in the eye and say them, but you can do it.
Good luck, and please, by all means, let me know how it goes.