Hi, I Am Sure You Get Asked This Alot But

Hi,
I am sure you get asked this alot but how do you decide if you want to stay in a marriage? My wife is putting alot of pressure to buy a house but im not sure if i want to commit to 30plus years more together. What is complicated is we have 2 kids 4 and 1 who i adore and dont want to abandon. I find her hard to live with, she is a messy person and i border on ocd. we have opposing views on alot of things and i often feel stressed when she is around