Seeking expert testimony is a sign of strength. A personal relationship with a caring professional is proven clinically effective.
I believe that I can help you with this situation.
Your former boyfriend changed his feeling for you, perhaps because the notion of growing up and becoming a responsible adult father was too much for him.
As long as you wore your IUD, having a baby was just a theory that your were able to talk about.
Once you became available to become pregnant, he avoided sex and relieved himself with porn and masturbation.
When you confronted him he was forced to tell you the truth: that having a baby was not his main priority.
He probably understated that fact and was terrified of becoming a father.
He should act like a responsible adult and move out of the house instead of having this in your face every day.
Not all men are like this. This man's behavior is immature and quite irresponsible and selfish.
You are, in a real sense, fortunate to have found out what kind of man he really is, before you had a child together.
I suggest that you insist he leaves the house, or if you can affford to, leave the house yourself and get him out of your life.
I have a very encouraging book for you to read. It will help:
You will find a real man and not just a selfish boy and you will find true happiness.
I am so sorry about your present heartache, but you will leave this behind.
I shall keep you in my prayers.
Elliott, MAE, LPCC, NCC, CCMHC