Finally, I understand why do some people two-time.

There's three reasons.

One: Either the girl or the boy is a BITCH.

Two: Either the girl or the boy wanna have two people to love him/her.

Three: Either the girl or the boy can't feel the love from the opposite.

So, if any of your partner two-time you.

Don't blame him/her.

Blame yourself. Ask yourself why.

Did you not love him/her enough?