He says he likes you, but he doesn't like your ideas or attitudes? Huh.
As an astrologer, I would NEVER advise anyone to make choices based on astrology. And ALL synastries have conflict, because no person is perfect and all relationships will turn out to have problems.
So you have they synastry in front of you. You like him.
DATE him, and go SLOW. Take your time getting to see how he treats other people, whether or no he is pushy, etc etc.
And as you spend time dating him over the next couple of years, remember the synastry and compare it with YOUR observations.
In the end, astrology is ONLY an influence. And what makes or breaks a relationship is not the synastry, not the love, not having a lot in common. It is the desire TO make if work, coupled with enough emotional maturity that the two of you can treat each other kindly even when upset.
And forget about composite charts. They do not indicate how you two get along. They indicate how outsiders see the two of you as a couple.