K.:
Hello and good morning! Congratulations on your baby girl!
You didn't say how long you've been in this relationship. So it's kind of hard to give advice but I'll go with my instincts/gut, first. Please do NOT be offended by my questions. These are questions a very good friend asked of me years ago.
1. How was your relationship with your partner before your daughter was born?
2. If it was awful before - why did you stay? If you stayed for love - do you still love him?
3. If it was awful before - why did you get pregnant?
4. WHY are you unhappy? This has so many variables. No relationship is perfect. There are days I really would like to say "Calgon take me away!"
I don't know what your age is. If you have any family support system locally, etc. many factors need to be taken in to account when it comes to relationships/marriages. But I would think the MOST important question:
Are you better off without him? If you answer is YES. Leave. Don't waste another day with or on him. You would be doing yourself injustice and setting a bad example for your daughter.
These questions are going off a little because I don't know how long you've been together, if you are married, etc.
Is it possible you have post pardum depression?
Have you tried talking with him about how you feel the relationship is?
Does he know your expectations? If he doesn't know what you want, he can't read your mind.
Life is never easy. I know that you would want your child's father involved in her life. YOU CANNOT CONTROL HIM and his actions. However, you can set good examples for your daughter and be strong, confident and talk (not yell, although it's sooooooo easy sometimes!!) about the issues you have. It is possible to get what you want, but the other person needs to know what you want.
Please be checked for post-pardum depression, it can and will affect you, your daughter and ALL of your relationships.
Please let me know how things work out.
Take care.