I'm thinking of purposely seeking out relationships with girls who might cheat on me
Why would you seek out such situations?
I like the idea of being cheated upon. I'm in love with an adultress in my circle of friends.
This doesn't sound like very healthy behavior.  This could cause serious emotional harm to you and I think you might want to speak to a professional about it.
I'm not worried about it.
You should be, seeking out problematic relationships is bad. You could end up alone if you keep doing it.