Is it possible to be loved by a man that has a girlfriend?

I need yalls opinion on this. There is a man ( a Leo by the way which are loyal to a fault) that says that he has fallen for me, BUT... he is ( his words) "in a relationship with a women and her children look to me. They are attached to me, and I them (they are not his biological children) . Also she pays my bills and spoils me. She shouldn't do this and it bothers me, I am a grown ass man".
I seem to have fallen for this man and he has been nothing but honest with me, at least I think and feel he is. He is slepping with me and her, although he says it is only when he absoultley has too! I didn't know this part in the beginning otherwise I would not have, BUT... yes , I am still engaging in that act.
My question to y'all is, do you think it would be worth it for me to wait for him to work it out to where he can be with me without hurting anyone (which could take a grip). I feel that it would be, however I am also emotionally compromised and I need some logical opinions, NOT emotional.
Is it possible to be loved by a man that has a girlfriend?
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