Should I Keep Her?

My current girlfriend of 16 months and I have been having some difficulty throughout our entire relationship.

I grew up in a household that didn't teach me any manners of how to be a gentleman, and she wishes I was one; I do, too. She grew up in a loving, unconditionally, house with two loving parents. She worships her father and wishes for me to be exactly like him, which would be nice as I do like him, too.

Some of the problems arise because she is either too emotional or I'm not emotional enough. She says that each day she thinks of dumping me, but she won't because she loves me, too much. I love her so much, too. I don't want to break up with her, but I don't know how much either of us can handle.

Should she and I stick it out, should I change, which I am trying to do but having difficulty and seem to always be slipping up; or what?