What's in it for a guy to get married?

Just thought I would chime in a bit here considering I just got engaged to my girlfriend of over 7 years.  My girlfriend is amazing... smart, beautiful, successful, laid-back, and loves her and my family.  She doesn't really nag all that much considering the time we've been together and compared to girls I've been with in the past for a far less amount of time.  Don't get me wrong, not everything is peachy all the time.  We've had our fair share of issues, but nothing like some of the stuff I've seen go on with my friends.  She's not a gold digger b/c I'm no millionaire, and she started making 6 figures after just three years with her company. 

So, it really does sound like a lot of guys on here have been burned pretty badly.  I mean, come on guys.  To be single for the rest of your life sounds miserable!  It probably is nice at times and fun while you're young.  You can do what you want without "checking in" to make sure it's ok.  You can have a random hookup without any reservations.  Lots of perks for sure... but after a while, I'm betting a lot of you guys get lonely.  I know for a fact that statement hit home with at least some on here.  My girlfriend and I both love to travel and have been to many destinations all over the world.  In the past, I have also traveled alone and I always felt it to be kind of unfulfilling.  It sucked not having someone there to talk to and to share the moment with.  I actually remember thinking that in my head too.  There were times when I thought, "man i wish i had someone here to share this with."  I just think to be alone for the rest of your life sounds like a shitty life, especially when most of your friends begin to get married.  When you hang out with them, you start to feel like the 3rd, 5th, 7th wheel, etc.  Trust me guys, when you find a great girl, it'll all make sense.

On a side note, this is something peculiar that I noticed about having a girlfriend versus being single.  It seems like when you're single, it is the hardest thing in the world to meet girls.  Or at least hot ones that you're interested in.  But when you're in a relationship, it feels like girls either want you more, or they have a sense that you're taken and want to try and test your fidelity.  It seems like this has been my case going all the way back to high school.  I've been put in situations where my relationship has definitely been tested, and thank goodness I was able to resist temptation.  But, I'm sure a lot of you guys can attest to this feeling.