confused feelings

I was previously in a really short fling with this guy a year ago and have had feelings for him ever since. He would always act interested in me over text and eventually he admitted to me that he liked me and i told him i did too. We have been talking for 2 months and for a lot of the relationship my feelings for him have lessened. It’s like I want what i can’t have and now that i have it i don’t want it! I thought having sex with him would change these feelings but they haven’t that much. I’ve told him no christmas presents and he’s bought me an $130 necklace and was planning on asking me out with it and doesn’t know that i know. I don’t know what to do. Its so nice of him but tbh i really hate that he has bought me this expensive of a gift this early in a relationship when i’m having mixed feelings for him. My friends including my guy friends that are close with him know that i think that it’s too much and have spoken to him yet he still wants to give it to me. What do i do??? help 😭