My b'day is 12th Sep 1992 and my partner's 13th April 1987.are we matching?what will happen us?

Yes, you are very compatible for each other due to the similar personalities and values on life. You two are good at forgiving and respecting in the life, which bring love and fun to your love life. In the future life, your partner should be active in your relationship and you should communicate with him more often so that you can avoid misunderstandings and conflicts. Best wishes to you.