I'm going to break up with him.
What made you want to break up with him?
I'm so sick of his whining. I can't stand it anymore.
Breaking up with your boyfriend might be an answer in some circumstances, but letting go of someone over the fact that sometimes they whine is a poor reason. Discuss his behaviour and see how you can work on the communication in your relationship.
It may sound bad, but I'm too good for him anyways. It's not my problem to deal with his whining attitude.
There's nothing wrong with wanting to end a relationship, but it sounds like you might be able to fix the issue just by communicating how you are feeling. If you really just don't want to be in the relationship though, it's your prerogative to end it if you want. If you do break up with him, make sure to do it politely.