Did you marry young, and get a divorce for other reasons aside from abuse/cheating?

I started dating my husband when I was 15, engaged at 18, and married at 21. I’m 23 and now wonder if I didn’t give myself enough time to date. Maybe I settled with this. I love him, but the thought is there. I have worked with men, and it was like I was wondering “what if” because I was so compatible with them after conversation. I feel that I am not the happiest I can be but I made vows..I’m clearly a much different person than I was when I was 15, and 18. We both grew into different people.