Is it normal to have frequent ups and downs?

I have frequent ups and downs. One minute I can be talkative and in a good mood and then later on, it's like my twin has taken over. The reason why this is happening is because to be honest I'm very unhappy with my life. I'm 22 and I don't have any boys to hang with, those guy friends you can depend on for a good night out at the bar or club. I feel lonely and sad. All I do is go to class, go to the library and am in the Psych club. I hardly have any friends to go out with. I want to enjoy Fridays like any other guy would, meeting girls at clubs, dancing and having a good time. Or even having friends to go to the mall with and check out girls. I've never had a good friend to go out with.

I haven't had sex in such a long time and I'm so ready. I feel like a complete loser because for a 22 year old I should be living it up!!! I don't have any lady friends to call up or even kick it with. HELP!! I'm in need of advice.

Also I live with my mom, her fiancee and my brother. I still have some resentment towards my mom's fiancee because one time we were out eating at Applebees and I was telling my mom that I wasn't having any luck with the girls I was meeting at college. She told me maybe I was doing something wrong and my mom's fiancee busted out laughing. This hurt so bad! I was so angry and when we returned home I got into a fight with my mom's fiancee when he tried to talk to me and I just wanted to be left alone, but he still tried to get up in my face saying "You think you're so big and bad". Before he came to talk to me, I got into a huge argument with my mom so he tried to talk to me after, but I didn't want him to talk to me. I started yelling at him. I got up and punched him in the eye. He hit me back and I tried to hit him again and he pinned me down. I remember it like it was yesterday. Since that day, things were never really the same. That was 3 years ago, but I still hate him for it. In addition to this when I left my college and came back home, I was very depressed about how I didn't have the college experience everyone dreams of. The fact that I didn't have any luck with the girls I met and wasn't excelling in my major led me to depression and made me think less of myself. My mom's fiancee didn't help at all. He distanced himself from me. So both of these things is why I get angry at times. When I think back to these two events I get really mad.

BOTTOM LINE: I need some good friends to go out with and a few lady friends to kick it with and some sex cuz I'm one unhappy 22 year old. COMMENT!!!