Should I go ahead and fulfil his desire under these circumstances..!?

He's giving you what you want now. If you don't want it, say so, but don't complain later that you never got the chance to have a wedding and how he "hurt" you. Its been long enough for you to be over it by now... Ps. Don't have a baby if you have unresolved anger or bitterness with him because a child will only make it worse. I see it all the time & I just feel bad for the kids that have to grow up like that.