Ready for baby number 2

Kayla

So I just had my son 6months ago and I will say since he was 4months I've wanted to have another but recently I've really been thinking about it more often and really want to start trying for baby number two but with mine and my Fiancé age different (there's a 13year age diff) he doesn't really want to have another he has a son from a previous relationship that is 17 and then our son that is 6months but I really want one more and then that's it and when I bring it up he doesn't say anything and tries to talk about something else. I want our son to have a sibling to grow up with being that his brother will be going off to college next year. Don't know what to do ☹️