Late 20s breakup

Anyone in their late 20s (27-29) go through a breakup and find hopelessness in the age that things are ending at? I’m sure others in this same bracket have many friends who are happily married with kids and then there’s us, back to square one. I did like the girl that broke up with me but I think I’m more sad about having to restart all over again when I had a time table in my head of wanting to be married and have a kid in early 30s (I’m 28 turning 29 in 3 months btw. How does one find any positive in this?