Please read! Close friend & his clingy girlfriend?

Ok so me and this guy have been friends for about a year however my friend had a girlfriend before i met him (they have been together for a yer and a couple months). Mind you i have no intentions on dating this guy. So when we first started talking he would flirt with me and tell me i was pretty and what not but because i knew he was in a relationship i thought nothing of it because i did not want to come between him and his gf.last year we had 2 classes together then we stayed after school togethet for a sport. Appertly he talked about me alot ot his gf so she told him not to talk to me (insecure much?), we remained friends because he still wantd to be my friend and talk to me but now here is where i am upset:

I know it is none of my business but she is clingy as hell & when i say this i am being so serious. I absolutely NEVER see him alone, she is always whereever he is (she would even sit & watch at our practices sometimes) Whenever she is around he pretty much ignores me and our other group of friends unless its a dude. We actaully did become pretty good friends so it kind of hurt but Ive learned to deal with that cuz she gets mad if we even laugh together. Keep in mind we r in 10 grade and he is in the "super serious " relationship

So we were talking and i was talking bout maybe having a party and he said he would go and my idea sounded awesome. So i pass out invitations and because i am nice i invite his girlfriend as well, but she cant go. Since he said he would go , i expected tht he WOULD go but now he says he wont come because his gf cant go.

Now i am NOT jealous of his girlfriend but i am hurt that he is not coming and i realized that he doesnt have many friends because of how "serious" their relationship is( he even admitted he doesnt have many friends) and when she says jump he says how high to everything. Idk i just think that he is letting his gf control his social life. But tell me honestly, am i wrong for feeling like this?