When would you expect a ring?

Been together since grade 8, now are 20, and 21 been together for going on 7 years, he’s almost done his last year of schooling for engineering and has secured a good job, we have a almost 5 year old and a baby on the way, we have always just been two peas in a pod, we are such similar people it just works so perfectly. We’ve been out of highschool for 4 years and a lot of our friends are engaged. I never really thought much of it but we are going on 7 years and I just don’t know when I should bring it up being like .. are we getting engaged or