LIFE SUCKS

life sucks for me at 40

I'm 40 with a wife and a 10 years old girl.
I was laid off 2 weeks ago after spending 3 years in a company making just ok salary to get by.
This is the second time I got laid off. I was laid off 3 years prior from another job. It took me 3 months to find my last job. My wife is a demanding woman and not very considerate at all. She works but only makes minimum pay. She really hates her job and wants to quit all the time (she still does). Naturally she turns to me for complaints all the time. That kills our marriage. I found she doesn't love me anymore. We sleep in separate bedrooms (we still do) and sex is pretty much nonexistent. I remember I suffered a very bad case of depression during that 3 months period.
Since that time I have been having a major mid life crisis. I feel insecure and become very conscious that time is running out for me. I achieved nothing in life (compare to my friends) and still hasn't made a mark in the world.
I don't know what went through my head but I somehow got myself a girlfriend on the side about a year ago (from my part-time job) I think it was the thrill of being irresponsible. My gf costed me money of course and I ended up being in debt (cannot let my wife knows) My gf is a prostitute by profession by the way. In the beginning this fact drove me nuts but recently I came to accept it. I just stopped picturing her with other men in my head. I wouldn't have believed it if you ask me a year ago. There had been many episodes of fighting and crying because of what she does. In the end I guess she is not my wife that kind of draw the line for me in my head. I didn't meet her by being her customer though. I didn't know what the does in the beginning. She is married too.. It is funny her husband seems to know about me but doesn't seem to care. He is another big time loser I guess.

All I know right now is that finding my next job should be the most important thing on my agenda. I will get more and more nervous as time goes by. Both women are giving me pressure everyday too. But the thing is I don't know why but I'm not motivated at this point in time.

what is going on with me?