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

So, my husband and I have been together for 5 years as of next week. We have a 4 year old daughter together. I love him (well, I think so), but our relationship isn't super healthy (I'm super introverted and he thinks it's fun to make me uncomfortable/anxious, he doesn't take 'no' for an answer, etc). I'm constantly second-guessing our relationship. We got married and started our family young, so I feel like I'm constantly wondering "what if" - what if we hadn't gotten married, what if we didn't have kids right away, what if it was all a huge mistake. 

Anyway, enter the ex. We "dated" in middle school and hooked up a couple times throughout high school. I never felt so passionate about anyone. We didn't have the greatest relationship either - very off and on - but I deeply, deeply loved him. So now he keeps popping up in my thoughts...

Here's the kicker: he's got a daughter of his own, although I just recently found out he had split with the girl's mother after she broke off their engagement. So now I have this urge to reach out to him - to see if there's still something between us. 

I never wanted to be "that girl" - the one who gets married and pregnant too young, the one that ends up divorced. But I'm not happy. I don't know what to do...do I reach out and see where things go? What do I tell my husband? Or do I just bury this all in the back of my mind until it eventually goes away??
<bot>: I wonder if I married the wrong person, I can't stop thinking about my ex, but I have a family and I don't know where to go from here.