Omg! I feel horrible; I dont know what to do.

So I've been with this guy for almost 2 months now. I honestly thought I was gonna fall for him. He's just so amazing. But lately we have spent much time together- about 2 weeks actually- and in that time I've realized we moved way too fast. I care about him, but now I see its only in a friendly way. Tbh I'm his first everything- gf, kiss, lover, etc. (But he is older) I just really don't want to hurt him. But I also know stringing him along will only make things worse. Somebody please tell me what to do. I'm going stir-crazy trying to figure this out.