Please tell me it gets better

My heart is shattered… absolutely shattered. My bf and I of 10 years with 2 kids have broken up (we have reasons why we haven’t married). And I’m so devastated. I can’t stop crying. Us being in the same house isn’t making it any easier. 10 years. 10 years of loving this person with my whole heart and soul. I can’t go through this… I’m trying to be strong for our kids but I can’t stop crying. Please tell me it gets better… I’m so heart broken but he’s acting like it isn’t bothering him at all.