First, Talk to Her

If he doesn't know how he feels, then talking to her could be risky.

Have you talked to your daughter's mother about this?

That would be step number one.

You have a daughter, you live together, you get along great. Sounds better than some marriages. Except for the fact that the two of you are not involved romantically.

You need to sit down and talk about this honestly with your (girlfriend? friend? roommate?) and work out these issues now.

What kind of relationship will the two of you have? How will you raise your daughter?

The relationship you are presenting to your daughter is one of a married, two-parent family. How will it be when you finally have more money and can move out?

Change is really traumatic for such young kids. You need to think about what changes in your relationship with her mom will do to your daughter and how to make adjustments as easy as possible. That requires knowing what you are going to do ahead of time and having time to prepare for it. Whether you and her mom resume your romantic relationship or if you decide it won't work.

There is nothing to talk about, he should just move on.

So, talk it out with her mom. It might be scary and intimidating, especially in light of your history and the hurt she went through, but you are an adult -- think how scary it would be for your daughter to be trying to figure out her parents relationship when it keeps changing.

I don't know what the end result will be. I do know that you and her mom need to figure it out and then be grown ups about it.

Good luck.