I think I might be in love with a married man,
Are you in a relationship with this married man?
No, but I want to be.
I know your emotions can be overwhelming, but you should not get into a relationship with this married man. It's completely inappropriate to date someone that you know is married, because you could be contributing to breaking up someone's marriage and family.
It's not a big deal to cheat on a wife if she's a bitch.
That's not your place to decide, no one deserves to be cheated on. There are plenty of men for you to date who are not marred.