Tips for becoming more reliable, more responsible?

Hi everyone, @fremen_warrior is back after a rather long hiatus with a personal development (/relationship) question. I am in my late twenties. Recently I’ve come to the conclusion that there are quite a few pretty (fun) girls out there who are involuntarily sharpening their teeth, looking at me as if I were some sort of an engagement ring dispenser.

Now, putting aside my absolute terror at any and all forms of commitment, I also realized I either have impostor syndrome, or I am really self-aware. I decided I want to become a more responsible person just in case one of those girls is determined and crazy enough to break past my defences and rearrange my life.

Have you got any tips, things that work for you, to enhance those kinds of qualities? I have a stable job, I stay in shape, I’m terrified someone might have high expectations of me and I could fall short. What does reliability mean to you, what are the most important qualities in a…gulp… family man? ;-) Joking allowed. Cheers!