It's all about attitude and how confident you feel carrying a 35. And how do you feel about it.
My favorite B size is 30, athough I have one 35 which works well if I need to carry a lot of things. I am not gonna lie, it does feel like luggage sometimes but it's still a keeper for me though.
It really has that tote look, works perfect when I need to carry documents and it is black with phw so easy to mix and match.
I won't buy another 35, but I think it is great to have one for variation.
Some people don't like 35 from the start and think they made a wrong choice by buying it. Then it will only sit in the closet. In that case I would suggest selling it, but that doesn't seem the case here.
In your situation, I would keep it. It seems that you always enjoyed it and never really worried about the size until your husband gave you his opinion about it.
So for now, I would suggest keeping it.
If you still have doubts over a couple of months, you can always re-evaluate
.