I'm a 36 years old male.

Skipped all the "getting drunk" going to festivals, nights out, etc off my life to work extra hard to make a better living for myself since I turned 18. 
Never gambled, don't drink alcohol, don't smoke. 
Built up my own business from the ground up while doing cleaning work for minimum wage  Skipped holidays for nearly 20 years.

Now I'm 36, run my own business which I'm quite successful at, finally got a home, all by myself, but realising that I'm very lonely, have basically no friends, just a few work acquaintances, and if I died today, would probably take over a week until someone else noticed it. 

Should I have balanced my life more in the past ? I find it pretty much impossible to make new friendships out of nothing at my age.