Your focus on "getting a girlfriend" may be holding you back. Girlfriends aren't possessions. It's not like you're going to walk up to a female and say, "Gimme you."
Try shifting your focus to becoming a boyfriend. Begin expressing some of the qualities you'd express if you were already a boyfriend, especially towards the women who are already in your life. I'll bet you're repressing many of those qualities because you think you need a girlfriend to express them. But those qualities are probably what will help someone find you attractive in the first place.
For example, if you think you need a girlfriend as an outlet for affection, then try expressing your affection now towards the people who are already in your life.