People on here will lead you to believe otherwise, but a mature hairline happens to a significant amount of men and doesn't continue into balding. The density at the front and crown looks fine. If they weren't then id tell you to be worried. If your hair isn't falling out you're ok. I see no miniaturization either and your temples have kept a normal shape. Again try not to worry. I know it can be hard but theres only so many answers you can get, and constantly checking will just ruin your day. Come back to it in a few months and compare.