penetration COMPLETELY changed how I see him

okay hyperbole in the title but it's still a huge change. My friend and I have literally been friends since forever, and like in the past two years we've been slowly doing more sexual stuff together. It kinda became a thing that sometimes when we hang out, pants come off and mouths go places, and it's no big deal. We're chill like that. It only ever felt like a fun casual thing. So obviously we threw a wrench in that and decided to try having sex. Decided is a STRONG word, it really just kinda happened. Very much a heat of the moment kinda thing. But genuinely, the moment I felt him go inside me, it's like my mind broke. I had a full system reboot. It was my first time, it objectively kinda sucked, but feeling him in me seriously changed something in me and in how I see him. We did it again, and again, now it feels amazing and the feeling only gets stronger. We've always been close, but now I ALWAYS want to be with him, close to him, and when I'm not I feel so weird and empty. I've been wanting to kiss him, like really bad. List goes on but yeah I think I love him, like love love. Am I stupid or can you fall in love from penetration? What do I do about our friendship? Is it even a good idea to keep having sex with him? Sorry for the rambling I'm kinda losing it