Staying interesed!

Hi :)

I want to know, from anyone out there dating or married, how do yo manage to stay interesed in one and other.

I recently started talking with this guy about, let's call it, "liking eachother" and I already askking myself if he does still like me after talking so much, hahaha.. what if he gets dissapointed? What if it is me who feels like that?