I'm pregnant, I'm a junior in highschool and my boyfriend is a freshman in college.

He barely started school and one day I decided to go to class with him. He did whatever he could to not seem like we were together.. even when we got off the car, he just walked as fast as he could to make it look like he doesn't know me. He's acting like I'm nothing to him all of the sudden and I'm truly hurt. What do i do?