dont know what to do - please help

i got with a guy from hockey on a night out however i am 17 and he is 22, he is nice but the age thing is really putting me off to the point where i am stressing over what to do. Theres another guy i like and he texted me which made me think i dont really like this other guy but just cos i wanted to get with someone (sounds bad i know). He has invited me for a drink but i dont know how to phrase that i am not interested in him and stuff. He just seems a lot older and i cant see it working if i am honest. surely if i liked him i would be jumping at the chance, not feeling like this. anyone been in a similar situation? x