my partner was married for 4 years, and a child came out of that marriage...?

[MissKnowItAll]

i sometimes feel like they shared something really special, and even though they barely speak now, they only split last year, and as i highlighted in a previous question, i think he may be thinking about her still. i sometimes feel i am a replacement for her, even though he says he loves me. we are not married as yet, we plan to, but im not so sure atm, because of these feelings. it wouldnt be right to enter a marriage if in doubt. and its hard when people say the bond of marriage is never broken even after a divorce, it makes me feel like i kind of dont have a hope, and even if we get married, our marriage wont be as important as the first one.