> This has lead me into a situation where I was poached into marriage and used to fulfil another’s needs - one who does not take my own needs into account.

imo that this feeling comes up in most marriages. might be a good idea to get some third-party feedback on your reflection(s) to asses whether there is as much basis to it as your feelings suggest or if it can be worked out.

a long relationship has some value in itself, so the opportunity cost of a unneeded divorce could be huge.