Should i be worried about paying for boyfriends house

[Centaurpede]

So, I live with my boyfriend in his house, we are planning to move into our own one in a few years. He wants to do up this house and wants to share costs of doing that. I have enough to share costs comfortably but I would rather keep the money for new house which would actually be mine too. Aibu? Or should I set a limit on how much I will spend on this one?

[Madamum18]

If you are truly confident in this relationship and IF any money made from the sale of his house will be FULLY used as part of you buying a shared property, jointly owned...then it could be viewed as a mutually beneficial project. But you have to be really sure about that methinks!

[xtrachattypatty]

OP would love an update on this @Centaurpede

A few weeks ago, I told my bf if he wanted to move into my place long-term we'd need a cohab agreement (but that he was welcome to stay with me for the rest of lockdown).

AFAIK he's not looked into it and certainly hasn't mentioned anything about it!