<human>: So I either didn't love her as much as I thought I did, or I have big problems with commitment...

Met a wonderful girl from Europe here (US), hit it off, visited each other in the US a few times, then did long distance when she went back to Europe (extremely rough time).

We arranged for her to come back for 6 months and live with me.  It was a roller coaster needless to say.  Some great times, but peppered with more fights than I would have liked.  Mostly when we would hang out with friends, but she didn't enjoy it as much.

Now she's back in Europe, and we haven't talked much, but now she's talking about coming back again and wants to live with me again.  She wants to "change" to be more compatible with me, but naturally I'm afraid of the same result as last time (it still sucked a lot when she left).  

I'm hesitant to have her come back.  I think we have a lot of chemistry, but not so much compatibility, for obvious reasons.  Clearly I'm afraid of the commitment of living with someone and realizing the only way we could be together for longer than 6 months is if we get married.  But maybe that's combined with me feeling like I love her, but just not enough to make that commitment.  Maybe I'm just an asshole.  Maybe all 3!  There are many more details I could write, but I'm sure I've already put people to sleep.

Can you provide a brief overview of the text?
<bot>: Long distance relationship.  Spent time together, I'm either afraid of committing to her long term to make it work, don't love her as much as I thought, or both.