I am feeling emotions

I have been pretty much happy with myself and my life these past few day. I got a new shirt at goodwill, I went to my favorite antique store, I hung out with my friend, and every time I have looked in the mirror I’ve been like damn, I’m pretty asf. And now I’m having worries because I know that sooner or later I’m going to crash so far down I won’t be able to feel anything and I know it’s coming. How tf do I prevent it?