<human>: I once fell in love with someone while I was in a long-term relationship with another guy (a very nice person - guy a)

Now, I am in a relationship with someone new (guy b) because I felt like I was emotionally cheating on my previous boyfriend.

I am attracted to guy B because he was so similar to me in many ways. He's a nice, smart person, and all the things he does and likes are very similar to me.

I cheated emotionally with guy A for a while, and I really meant it when I said "a while" -- without guy A knowing. He wouldn't have known because he's so focused on his "games" that everything else doesn't seem to matter to him. 

I am afraid that I have fallen in love with guy B because he is so many ways like me. I am afraid that what I was able to do is what he is also capable of doing after a long-term relationship.

Can someone reassure me or bring me back to reality what is happening, and why am I afraid of this?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: if you know you are a bad person, and fell in love with someone like you, would you continue with this person, or find someone who is different than you?