I don't know if I believe in marriage, but that may be because I'm not sure I've ever been in love, and obviously one comes after the other.
I agree with black00ws6 "Marriage is easy if you have found the perfect match."
I've had many relationships and a few serious ones, but looking back, I'm not sure if I was ever 'in love'.
Now I love my daughter no doubt, I miss her more than anyone/thing when she's with her mother on my off days, and I would do/give anything I could for her, that's the only real 'love' i know of.