Dating

Why did he start pulling away even tho he called me his girlfriend?

So I spent a week getting to know a guy over text and it was great, spent Friday and Sunday together. The next week was okay and I was overthinking things so I asked for reassurance and he gave it to me and invited me over the next day on a and i cried and he reassured me once again and then one more time on his own without me asking. Then i ended up staying with him Friday and Saturday night and on Saturday he introduced me to his friends as his girlfriend and it was amazing and i was so happy. he never asked and we didn't really talk about it. The Monday after the weekend I called him because I was having a bad day and kind of freaked out on him for more reassurance and asked is we are on the same page and he said yes and i asked what that meant and he said “i like you and you like me” (which i definitely shouldn’t have done) but he continued to initiate conversation and talk to me Tuesday/Wednesday and I offered to grab dinner on the coming up weekend he said “we might. i have some things to take care of this weekend” and i just said okay. And now its today (Thursday) and we have been talking but this whole week he's been talking to me but i can tell he's pulled away and way more distant then he was in the past 2 weeks. After offering dinner i haven't called for anymore reassurance and am trying to give him the space that im assuming he needs but he literally called me his girlfriend and then pulled away and that really meant something to me and ik men dont wanna talk about feelings and when you push them they pull away and i really really really dont wanna lose him so im not pushing but i also dont wanna waste my time. but im terrified if losing him and like never being able to see his face or laugh with him again. do i just keep giving him space and hope he comes back to me? we are still texting but its super dry and I don't know what to do about it

Why did he start pulling away even tho he called me his girlfriend?
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