advice?

for around 6 months, i liked this girl and blah blah blah one day got w her. we stayed together for exactly 500 days and the last month or so if us being together was quite weird. all of a sudden it kinda seemed like we didnt have time for eachother and to be honest we both did and still do have important things coming up so idk. either way, its been a month without her and i realised earlier this week that i live for her. i sit in my room with the blinds open hoping she’ll walk past and see m, i sit in my garden and play darts hoping she’ll walk past and notice im there. i go on walks hoping her family will drive past me and tell her. i do literally everything for her but the weird part is i dont remember her anymore. like idk what kinda weird response it is from my mind but all my senses went funny and im never hungry anymore and my smelling is back despite it being gone for several years. and for some reason all of this shit is going on but i cannot for the life of me remember what her voice sounds like or where certain photos are from. there are only certain things i remember from her and they’re pretty small memories and weird but they repeat in my head all day everyday. i see her every night in my dreams and i think of her in everything i do. i dont know how i feel about her but its clearly something for me to be acting like this because im infatuated with her and i literally cant remember most of her. i try to put the pieces of us back together in my head but i can only ever get small flashes and blurs of stuff coming back to me. am i okay? like has anything like this ever happened to anyone else here?