I would definitely keep seeing your therapist and talking to them about this. This could be from something that happened when you were a kid, it is hard to say from just a few paragraphs. There is so much more to a relationship than some guy is cute. You need to figure out what you want out of it, it takes time to get to know someone. You don’t want to put the cart before the horse, per say. Relationships that have no foundation usually don’t work out. Anything worth having takes time, I am talking about months and months not weeks. Having expectations about anything usually doesn’t work, either. Most guys your age usually doesn’t want anything serious or just a hook up.