Questions about my relationship?

Alright, well I've been dating this girl for about 4 months now.. I met her at work and about after a month at work she gave me her number and we met outside of work and have been crazy about each-other ever since. We get along great, laugh, spend almost all of are time together, etc. I moved in with her and her friend room-mate about a week ago. We say we love each-other about 50 times a day still lol. I think everything is going fine but im not sure.. When I started dating her she was a virgin (and no she is not lying, she really was). About a month and a half later she lost her virginity too me. I never pushed her in anyway too do it, she just finally decided too give it too me. Were both the same age, (20). She is a Junior in college. She's really popular and attractive. She is black and I am white. I've never been with a black girl before so this is all new to me. She has alot of "guy" friends. I am really jealous when it comes too that, even if we are at work and i see her talking too another guy and smiling ill get upset..I get upset too when she gives guys hugs. I used too talk too her about it and be all mad and stuff but I stopped talking about it when it upset me because i didnt want too ruin the relationship and think that im an over-protective, jealous boyfriend.. As far as comes, we used too have almost every day, any chance we got, when we were alone.. for the little past over a month she has not been wanting too have near as often as before.. its like everytime we do have i have too turn her on for a long time before she cant take it anymore.. i know ive had alot more than her but still.. shouldn't she come too me for sometimes? its like im forcing her too do it..not really, but that is what it feels like.. I think I love her alot more than she loves me. I'm always the one who tells her i miss her and act all sappy and stuff..she hardly ever shows her emotions towards me, i mean sometimes she will but not much.. she says i need too start going out and having guys-night-out and be with friends instead of making her the center of my life...i understand that i guess but it still makes me feel like she is getting sick of me..she says that if she spends too much time with a certain person then its like she never gets a chance too miss them so she will stop hanging out with them.. I dont know, alot of blah, blah.. i know..but if someone could write back i would appreciate it, thanks.