MESSY MENTOR-MENTEE KINSHIP

So, I'm in this mentorship grp by a youtuber for academics, It all started with doubts, soon we started talking about other things and this one eve, I normally said that i like his personality and he went crazy, he took that romantically and literally texted me the same night saying if i'd date him? omg i was so caught off guarded. he was really sweet at first but i was hesitant to be clear, i've been in a very messy relationship before and that guy gave me trauma and hence i was liking the attention at first, but i realized that i might repeat the same mistake as last time so i texted him saying that i see him as a friend. he was so corny tbh😭. he was like, am i not good?, and yk he used to keep asking what i like about him and that was so creepy. he literally texted that he wants to see me on a vc and he said that he wants to hug me tfff??? since i've developed attachment issues from my ex, i was already attached to this guy, yeah that's how bad my attachment issues are, but i'm working on them. This one day i finally told him that i don't like him romantically and he was okay but can i still flirt? omgg tf? i cleared the boundaries and he then completely withdrew and started acting w that idgaf behavior and whenever i need help now he acts either backhandedly rude or acts as if nothing happened. recently i told him that i'm attached to him and he has gotten ego boosted from that😭. chat help, or scold me to just not think abt ts. drop your advice please🙏😭