do u think it was petty or immature of me?

hi, so i unfollowed my crush i’ve liked him since we were in highschool & now we’re in our early 20s. I unfollowed cuz i was trying to move on since i confessed to him a few months ago but then two weeks after i confessed, i overstalked him on instagram and found out he had a gf all along. it’s just that why do u think he didnt tell me he had a gf? was it bec he was hiding her? Or was it bec he didnt want to seem taken? Idk it kinda feels weird of him not telling me he had a gf after i confessed to him. I kinda felt defeated and thought i might not have achance anymore… i sort of reflected and asked advice to some of my friends and all of them told me to just move on and told me that i was so brave in confessing first since he used to like me back in highschool too, but i guess he moved on already since he misunderstood that time when we were in college, he thought i already found someone thinking i had abf already which in reality, that guy was just a good friend of mine 😭

but idk ig i was just in my feelings and now i kind of regret unfollowing him since he didnt even do anything mean or bad to me, yet I still have feelings for him and i havent moved on yet.

should i follow him back? Despite him knowing i have feelings for him? Im just afraid he might ignore me and not talk to me anymore…