What should I do?

Tiffany

I have this friend and we were classmates and we sat next to each other in every class and then on the last day of school i went over to his house and had a pool party and then after that he kind of just backed away and now we dont really talk even though i text him like once a week and sometimes he responds but it never goes more than 6 lines for both of us, it never turns into an actual conversation. What do you think and what should i do?