Am i bad person?

i just broke up cause i was with someone with all of my heart and after 4.5 months he noticed that i texted someone in a dating app on *** at the first of the relationship, but the chat was only “hi, how are you” and “that’s good,” that’s it. that’s all. he broke up, and after 2–3 weeks i tried to fix it, but last night he said, “i don’t want to fix 100%, and i don’t have any feelings for you. i just care about you but not the same way.”

and i was asking how it happened — he said, “that night that i noticed, i stopped loving you.”

it was so weird for me. i was dying last night. i was thinking how he loved me and he doesn’t love me in one night.