My boyfriend needs space

My boyfriend of 8 months has been working overtime last week so all week we didn’t spend any time together, I was upset with him would send him texts about how I missed him trying to get his attention he was acting cold and distant. He had just told me that weekend how much he loved me wants to marry me and now he needs space that’s a shocker the only thing I can think of is this the day he said he needed space was the day he was going to see his kids mom after a year of not seeing her He keeps saying it’s not the reason for needing space he said I was to needy I was acting needy and texting him all the time just because I missed him