Boyfriend Flipped!

Hi ladies. Would appreciate some feedback. I am 8weeks along with an unexpected pregnancy. I have only been dating my bf 6 months-pretty new relationship. We were not using protection recently so this technically should not be a surprise but honestly it is. When I told him at 4 weeks, he was in shock BUT very supportive. Discussed moving in together and made jokes/baby names etc. he has been very supportive until literally this week. Suddenly he isn’t ready (I understand) and doesn’t want to be a father yet. And is mentioning our “options” he has become very cold and distant. I’m giving his space but I’m extremely hurt. And after sharing news with him when I found out, I was under impression we were in this together. I’m 32, he’s 38! Advise is appreciated!