My H nor I were mature enough at 21 to get married like we did. It't better to wait I know yourself better before trying to force relationships to work. Honestly now at 65 I feel like if the right persin came along I could handle a relationship but up to a few years ago.... no way & I wouldn't bother even trying.
Best to wait until you feel emitionally ready. I can attest, dying alone is a blessing compared to dying in a bad marriage or relationship.