Why do men always want what they can't have?

I have friends that are mostly men, we hang out playing pool, downing a few beers & joking around. At first, things go really good and it's comfortable being around them then all of a sudden things have changed and they start that flirting stuff. I don't dress sexy and never show any interest other than winning at whatever sport we are playing. I only want to hang out and have a good time. It's so many women out there that flirts with them and they just ignore her, giving me their sole attention. I don't want it, I have one love in my life and that's good enough for me but I am tired of losing friends because of lust. I don't really get along with women cause I am too rough around the edges and I don't take no s**t and don't do the drama thing so I guess I will just be friendless forever huh?
Why do men always want what they can't have?
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