both above indicate YES. I would add Yes too Until another something better comes along.I do not believe relationships are based on something better. I think when a relationship begins both individuals should have things in common along with compassion, understanding, most certainly Communication and a number of other things like friendship and mutual respect of each others independence and personalities. Breaking up should be discussed B4 finding a temporary replacement. Put yourself in the other persons shoes (as the saying goes) Mister Bruce (educator 2-17-14)
On one hand, I think that if you can even consider leaving him for " someone better" then he deserves not to be led on so he can also find someone better. But on the other, love isn't about who's " better" is about two people understanding to love each other's flaws and making it work. It's your choice really.
Only unless your unhappy with the person you were dating before. But if the person you were dating seems to be a nice guy and you picked someone else better then that will be wrong because you shouldn't do that.