Don't know if its the time of the year or what. But i am feeling old

And i am not happy with it at all. I know my GF for 13 years now have a kid thats 17months old and i am 28. Had a haircut few weeks ago and noticed i am getting grey


. To make things worse i started talking to a 22y.o colleague and yes the is a girl. We started talking on the phone etc had some nice talks and then she said it.... i was old


i feel fucked up now