You can in a lot of ways, you are one of the person that knows this man so use it for your advantage. Watch and pay attention to what he does or even say, if you think he is acting weird, then that is one of the sign that he is doing something that will destroy your relationship.
it's calculator.
Say, "I will never cheat on you."
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"You broke up with your boyfriend and he said that he doesnt really care are he cheat on you?
Ask your boyfriend. I'm sure he has some ideas.
NOPEE
Best is not to have anything to do with him, once a cheat always a cheat.
Kam Kow Choong has written: 'The works of Choong Kam Kow in the 90s'
Leave him. If he's going to cheat on you your obviously to good for him.
When she doesn't feel appreciated.
Cheat on him with someone else.
Be nice and don't cheat on him