Warning

Just because you are already with someone doesn't give you the right NOT to fall for someone else.
It's inevitable to have feelings for another while being in another commitment.
But be sure that whatever feelings you have for both persons, you're already aware which weighs more.
And don't stay in a relationship just because of sympathy or that you promised something to that person.
It'll hurt her/him more, if the only reason why you're with her/him is because of that promise and not of thatemotion she's/he's been expecting from you.
If you don't want to end up in this kind of situation, don't be in a romantic relationship just for the sake of having someone to call baby.

*end*