<human>: Can you condense the text into a few key points?

I am a serial monogamist. I bounced from one relationship to another for years until I finally decided to stay single and try to figure myself out before getting into yet another relationship. Then I met an amazing guy and we fell in love. I really thought he was the one. I even pictured us having kids. 

And yet, I know something isn't right about this relationship. It's been my longest relationship to date and I feel like I'm dying inside. My body freezes up when we have sex, my interest in sex with him is nonexistent, I cry all the time, we fight horribly, and I fear that I am trapped on a sinking ship...

I know this sounds bleak but I've never seen a longterm relationship work. It seems like some made up fairy tale or a delusion we tell ourselves because society seems to insist we get married or something.

To be honest, I would love to find the right guy to settle down with. I just fear it's impossible. Maybe it's me?

I would love to hear stories about successful long term relationships - married, common law, whatever. Tell me it can work!!
<bot>: Despite multiple monogamous relationships, I can't seem to make it work. Is it possible to really find the right person to settle down with?