Ok, where do I begin. I too have had depression for many years, sometimes very severely to the point where I cannot function at all, and every anti-depressant out there, I have been on at least twice. Therapy? Yeah, did that, saw several doctors, therapists, psychiatrists, psychologists and even a fucking minister. Funny thing though, just about every one of them was a fucking quack who made matters worse, not better.
You know what works for me, (not worked, it is an ongoing process) This...
http://www.ebaumsworld.com/video/watch/205974/
Ok, maybe not to that extent but...
-I choose not to keep up with the Jonses because society and the media says I should (I could write a novel on this shit)
-I value people, not possessions (will anyone really care what car you drove in 50 years?)
-I help others when I am able (they WILL remember Mother Theresa)
-I don't give a hairy shit what others think of me (This can be hard to do, and has to be worked at, but once I stopped trying to impress other people and just acted like me, my esteem went up. I am who I am and I can't be anyone else, if yoiu don't like me, fuck ya. I have more important stuff to worry about than to stress over that shit)
-My fucked up brain is one of my best attributes (you should check out my Facebook statuses, fucking brilliant)
-I don't take life seriously, nobody gets out alive anyways
As for the companion part...
Sometimes it is nice, sometimes you want your freedom. Sometimes it lasts a lifetime, sometimes you get divorced and she takes half of everything plus $1000/month. Sometimes you get along brilliantly, sometimes you want to knife fight with her. It is what it is. A companion will come when you are least expecting it, but do you really want one? That is for you to answer. I know sometimes I do, sometimes I don't.
Don't know if this helps at all, but if not...
Fuck it.