kind of long. typical boy drama.. Opinions/advice needed?

[Jessica]

i used to talk to a guy. he's 17. Lets call him A. we've been talking for about 8 months (yeah, i know. way too long to be "talking") about 2 months ago were hanging out and one thing led to another, i lost my virginity to him. we we're really good; it seemed to have brought us closer. about a month ago he told me he loved me but i didn't say it back. he understood why i didn't say it. about a week ago I was talking to one of our mutual friends and she said that A has been telling her he's "done" with me for a while (she didn't tell me when he said it). A and i had plans that day too which i ended up cancelling. he said he didn't care anymore. the next few days another one of our mutual friends (he's closer to me though) was with me a lot at school. he's also 17. i'll call him B. every time i was with B, A would come NEAR us with a serious face and not say anything. A's also been coming too close to me. i was sitting down and he was literally over me reaching for something that was on the opposite side. he comes around me a lot but he doesn't talk to me. he talks to everyone around me while staring at me. I just realized how stupid he sounds haha. I'm not sure why he's acting like this when he supposedly told our friend he's done with me. I still have feelings for him but i'm not sure what to do. I still haven't confronted him about him saying he's "done" with me but i will. i don't think it has to due with sex because we rarely have it and there's A LOT of girls that are always trying to get with him. I need advice on what I should do? any ideas on what's going on with us or why he's acting this way?