I think that answers your question then... I know the relationships I've been in didn't work out partly because I wasn't being the person I really am, and because my partner(s) didn't see me as the man I know I am which was difficult for us both (there were plenty of ther problems with the relationships too though).
I think that a marriage is far more likely to work out and make you happy in the long term if you are living life in a way that makes you happy and can be open about who you are and how you feel.