Will it ever happen for me ?

I just recently got broken up with , and I thought he was going to be the love of my life . I am only 20 years old but for some reason I feel like my time is running out , all my friends are at least married or have a baby and I want that (someday not now but definitely in my late 20’s!!) . I want the fine and loving husband and the pretty baby , but I keep giving my LITERAL ALL in these relationships and the outcome is just me left heartbroken everytime . This is me—— (not like it matters)- like I said for some reason it always makes me post on anon for some reason . Anyways .. idk what I’m doing wrong ? I know I’m the best girlfriend , are the guys I date just scared of commitment ?