E.S.
L.,
Just the way your note is written, you know in your heart what you should do. You don't NEED this guy, even if you feel you really want to be with him.
If you or he aren't willing to commit to marriage, then you shouldn't kid yourself about committing your daughter to an unstable home.
That's really what it boils down to. Moving in with him isn't going to be "having a place of your own" - it's going to be living in someone else's house who maybe has less rules than your parents? Doesn't try to run your life as much?
Whatever the reasons for wanting to leave your parents, for yourself and your daughter's sake, you should get a place of YOUR OWN. Not move in with someone else unless it's a roommate situation and SHE is someone who likes kids.
Not that I don't understand loneliness or any of what you may be going through - but in the end, if you stick to princples instead of rationalizing desires, you and your daughter will be much better off.
God bless,
E.