I hate entitled men. Calling you 'the chosen one' and that other women envy you.
No, in a relationship you choose each other and that includes being faithful to each other. No one envies someone that is married to a vain, lying, entitled, cheating scum such as he.
My ex husband was extremely good looking too (at first) - but the more his true personality was revealed the uglier to me he became. Looks don't mean anything if that's all they've got going for them.
Cut this one loose. You'll probably end up catching an STI and/or he'll get someone else pregnant. With this moron you are never going to have a secure family life and he doesn't even care.
There is no excuse EVER for cheating. And I say this even when it appears that people have presented valid reasons (his excuse is not one of them). If anyone isn't happy in the relationship they can properly leave before they meet someone else. Cheating is disgusting.
Pregnancy especially since it's your body, hormones etc that is doing on the work to bring his child into the world, is ALL THE MORE REASON for him to be more kind, considerate, supportive and self sacrificing to care for you and your feelings.
He is vile.