Rabbi Pliskin in 2 of his books has good questions that you should ask yourself on marriage. i think, begin again now, and maybe, the one about knowing yourself.
but, here’s some to start with:
1) do you have similar hashkafos?
2) are you UNattractive to him?
3) is there anything inside of you telling you to stay away or something like that? does the thought of spending time with him make you feel sick?
4) while you are with him, do you enjoy yourself? do you like what he brings out in you?
5) are you comfortable with him?
if you answered yes to 1, 4, and 5; and no to 2 and 3, then i’d say it sounds good to me.
butterflies in stomach and stars in the sky do not necessarily make good marriages and are not necessary for finding one’s bashert.
just, one more thing, if do decide to marry him, don’t keep thinking that you’ve missed the boat. once decide to marry someone, it’s your obligation to assume that he is your bashert and not to spend time thinking of possibilities that probably would or could never happen.
oh yeah, i would also add, do you respect him?