I got married for the wrong reasons once. Life didn't click into place, and I had no lovely surprise to find I actually loved being married. I hated it. I felt weird. I felt cold. I felt I was acting someone else's life, and I felt in a bubble, removed from my old self. I had never been able to stand his family, and suddenly I shared their surname. I suddenly went totally physically off my husband. I hated the idea that I was legally obliged to have sex with him. The rest of my life suddenly felt like a really, really, REALLY long and boring time.
My most enduring memory is waving the last of the wedding-guests off and thinking, "Shit, where are you all going? Don't leave us alone together."
I was honest with myself before the wedding, too, and I knew it wasn't what I wanted, but I was honest too late. I went through with it because by then plans were under way, the venue was booked, invitations had been accepted, and I didn't have the guts to pull out. It felt easier to go through with it and then divorce later. I was wondering in my head how soon I could escape while standing at the altar. I was lucky and had an amicable divorce on the grounds of 2 years' separation. Other divorcees I know had a far harder time of it.
I know so, so many people who thought that because they were of marrying age, or they ought to be married by now, they should marry whoever they happened to be with. I know so many people who thought that 'being married' would 'just work'. No. Life did not magically fall into place for them, either.
I have a DP now with whom I share a mortgage, children, and a surname by deed poll. When we got together, everything DID just click into place. Life just made total sense. We knew this was it. Neither of us sees the point in getting married, because we have what's important: each other. What does the state, or the church, or standing up in formal clothing in front of bored relatives have to do with what we have together? It just feels like an irrelevant, weird ritual to go through. We come home to each other because we love each other and want to see each other at the end of the day. He is the first person ever for whom all that 'till death us do part' stuff actually makes sense for me, and I do not want to marry him. I just want to spend my life with him.
If you're sure that marriage is what you want, then get married. But please, don't do it if you aren't sure. Have a massive party as often as you like, but don't have a wedding unless you want a marriage to this man. Weddings and marriages are two totally different things.
It's really, really good that you've been honest with yourself. You can be honest with him, too, and say that you just wanted to feel the same level of commitment from him as his ex had. Honesty is a foundation of a really good relationship, and a really good relationship will make you happier than a wedding-cake will.