how should i break up with my boyfriend who i really like but I know we can't have future together?

Just be honest and straight forward. First you need to sit to yourself and figure out why you feel the way you do. It will be a whole entire lot easier explaining to someone else how you feel if you understand it yourself. Once you feel that you throughly understand your position you need to go to him and explain everything. Keep in mind that you need to approach this situation tactfully, openly, and with great care and concern. Be prepared to offers answers to questions that may arise. If you are at all willing to try to work on the issue(s) that are keeping you from believing in a future with him it would be very beneficial to also explain that to him and then be prepared to do what's necessary to repair your relationship.

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