I've had every kind of relationship possible(marriage, 2yr ltr, 5yr ltr, 3-4mo relationships, simple dating). The best deal I ever had was when I was simply "dating" with no label. I had the power, I could do no wrong, she put me on a pedestal, it was the most exciting, most fun, her behavior was the best. I rarely got asked where I was, what I was doing, or who I was with. I did whatever the hell I wanted. Answered to no one other than myself. It was the ultimate freedom.
I have several male neighbors that frequently come up to me and tell me how "they live vicariously through me". They all wish they weren't married/in a LTR. They see the freedom I have, they see I don't have to compromise or put up with somebody else's b.s. They all wish they were me. Like somebody said above, they are the weaker males. It takes a strong man to stand alone and go by himself.
The single life isn't for everybody and there are definitely pro's & con's to both sides of the coin, but its tough to give up that freedom and power. I can see the attraction of a serious relationship, but remember you will be forced to trade your freedoms/power in order to have one. Sometimes happiness is just a mindset....be careful what you wish for. Once you go down that relationship path with a woman it always leads to marriage, especially the older you get. And at some point, marriage won't be good enough for her. Its a game you won't ever win.