That is short for a Western man. And obviously, at 25 he's not likely to grow any taller.
The bigger question is does it matter? If you're happy together who cares? Generally the guy is supposed to be taller but even in your case he is, just don't wear 6 inch heels and no one will notice/ care. If you're happy together they'll be thinking about how good you are for each other not about your respective heights.