My husband has gotten meaner ever sense our daughter was born and I don't know if I should leave him or not

I am afraid that we can't answer your question without more background information.

How old are you and how long have you been married?

When did the problems start and what have you tried?

What do you mean by 'meaner'?

My question is, why do you immediately think you have to leave him?

Have you talked to him? He may feel excluded or unloved after the birth of your daughter, and his meanness may be a reaction to that.

In any case, Cat is right, more information about what is going on would be useful.

my husband has gotten meaner ever sence our daughter was born and I don't know if I should leave him or not

Yes, if you do not want to work on your relationship and just want to leave then do so.

Have you talked to you husband about how you feel? What has he said?

My suggestion: talk to him. Still don't like what your getting then leave him.