Hi guys, I have a problem but cannot find the cause.

I keep looking for serious relationship and I am not happy with that.

For example, last night me and my friend went to a 2 girls home, but before I meet I had an expectation of meeting a girl that I suit and build a relationship. After I met her I realised she was a real slut :D but it was a disappointment for me then my mood decreased. I could have been just in "fucking" mindset but I was not somehow. Why I am not thinking about fucking many girls like every man's biological mindset.

Did you have this problem? Is it can be about my monotone lifestyle? Since I work at home I have a bit asocial lifestyle and when I get along well with a girl, I wanna keep her in my life.

But I wanna be in a mindset where I only see girls for fuck. Serious relationship might occur but should not be my priority.