You learned a hard lesson with this experience. You gave your heart to the wrong person, this does happen, not just to you but a lot of people experience this. The big lesson here is to never get involved with someone who is married. A married person is being "selfish" when they start up an affair without ending the marriage relationship they are in "first".

Yes, there are men who are married that not only engage in sex with the person they are cheating with but also their wife too. Feel sorry for this wife who is expecting and doesn't even know her husband was cheating on her. When a woman is pregnant she is extremely emotionally vulnerable. You spent time with a very SELFISH man and that's the truth/reality and you are not the only one that got hurt. His wife WILL eventually find out and she will be absolutely crushed. Be glad you don't have children with this man because that makes it impossible to completely break free.