I think you and your husband both need to be in agreement. Maybe sit down and really talk about why you want another one and why he doesn't. Is it the fact he is happy with boys, 3's an odd number, money, etc...
We are sort of going through the same thing. We have two boys, 3 and 20 months. I had always said I wanted 4 (I have no siblings and a really small family). My husband always wanted 2 - 2 boys to be exact. Then after our first was born, I went back to wanting 2. Our first son was extremely difficult and at 3, is still a challenge. Our 2nd son is more textbook so less challenging. We too are at the point where life is a little easier. I'm just weaning my 20 month old from breastfeeding.
We talked about it and my husband is happy with his boys, a 3rd for us would mean needing a bigger car, a bigger house(our house is 1500 sq ft plus half a finished basement), etc...Plus my husband doesn't know if you could handle the stress again, and not sure if could. Not everyone is cut out for having 3 and 4 children, and that's ok too! Having a 2nd didn't change alot, seems a 3rd would.
I'm also 35 and happy the boys are close in age, 2 is a great number as they have each other. I've heard from numerous people who have 3 that it is awkward sometimes with 3 - one child never gets paired with a parent, someone doesn't face someone at dinner table, middle child sometimes feels left out, although not done intentionally, etc... that 4 is a better number. Financially 4 is out of the question for us, 3 maybe? My husband is really against it so I have to say I think we are done. We have 2 healthy boys and the way I look at it, is if I were to get pregnant then it was meant to happen. I currently have an iud.
Wow I feel just like you. Some days I'm so stressed and happy the baby days are over, then I find myself longing for another one. I go back and forth on it. Just be honest and discuss the pros and cons. Things happen for a reason. One thing that does hold me back is money. I know money doesn't buy children happiness but I do want to travel, pay for as much college as possible, etc... and adding another child to that is going to restrict that for us. My husband and I both had childhoods with family vacations, outings, college paid for, etc...we want to give our children the same, more children would mean less of those extras. Children don't need endless amounts of toys and european vacations, but a week of camp, a family vacation to a beach, nice clothes for school, etc... I think are important. We also don't want to spend our whole life raising children. We love our children, but enjoy each other too and now at 35, we can enjoy life with a little less stress.
Everything falls into place, just trust that. It is very hard because what I thought what I wanted at 25 is not what I want at 35. Not even the same as what I wanted at 30. Have a nice open conversation with your husband and let us know how it turns out!!