“I met and fell in love with a guy who I later found out was involved with someone else. I co…”

I met and fell in love with a guy who I later found out was involved with someone else. I continued the relationship despite him being taken. He says he loves me, yet is staying with her. Saying that he feels obligated to. Even though he’s very unhappy. I feel broken without him. When she found out, she forced him to stop seeing me. It was soul-breaking. I feel like I’ve lost my other half. It’s so depressing to not have him with me anymore.