what should i do?

i'm 15 and i met this guy 5 months ago and i had a crush on him for a while but it died cause he would confuse me alot when we texted i wasnt sure if he liked me or not & we talked alot but just a few weeks ago he asked me to be his gf and i said yes cause i felt it would be rude to say no but now that were in a relationship he never makes time to see me, he always is at a party or whatever whenever i am free and want to see him, etc. I dont love him and i really dont think he loves me but its only been a few weeks so i feel i should wait and also wait for my affection to grow for him, but we are different people it feels like nothing will ever happen and i still get confused by his texts. it feels like we have signed a contract instead of actually being in a relationship. help?