Welcome! I agree with the person who suggested changing the username to something positive. It's hard to sign up here and admit you need to be here and I admire you for doing so. Looking at a username that makes you feel like you can do this will help.
There are probably online support groups to help you deal with the issues of caring for your daughter which might make you feel less alone in what you're coping with.
If the man you were involved with keeps contacting you and wants to stay in your life that's a good sign. Maybe issues with drinking are preventing him from making a stronger commitment to you. He sounds like someone willing to be a friend and you never know what will happen down the line!