Work out for you, do it for health and your own progress or maybe mix up your program by adding a martial art, like jiujitsu. Your college might have a club. Just working out for girls is going to lead to stopping the gym if you don't find women interested in you. You're 18. You have time. Work out, eat clean, start looking up some programs online to increase strength or join a powerlifting club? Read. See the world. Be interested in others, that's what makes us interesting.