Lonely At Night

I don't know what to do. I live a pretty lonely life and its starting to intefere with my work. I am a 22 year old graduate student and all of my friends have moved away or moved on with life getting married. At night, I have to leave the radio or t.v. on because the more quiet the room is the more lonely I feel. I have hobbies, I work out at the gym and I go rock climbing, and even goto the bars every week or so, but have failed to meet anyone. Part of the trouble is I that I look several years younger than my age, so people that might usually have fun with me write me off as a young guy not worth their time. This goes for both guys and girls. I just don't know what to do anymore, if my loneliness stops me from getting my PhD I will feel like I have failed at life completely. ~Jon Tweet