My first semester of freshman year, I got a 2.5 GPA

There will be a college out there for you.

But first, why did you get a 2.5?
Didn’t do the reading? Didn’t do homework? Didn’t study for tests? Too much time on sports? Too much time on band? Too much video games? Working?

Are you reading, doing the HW, and studying but still getting 2.5?
Are you in the right level of class for you? e.g. in honors but maybe you should be in college prep?
Are you studying while watching TV?
DO you look at the rubrics for the assignments and do them?
Should you be evaludate for a learning difference?

Other ideas:
http://talk.collegeconfidential.com/high-school-life/2026961-what-to-do-when-you-arent-doing-well-in-a-hs-class-p1.html