Is writing a note to someone childish or would it be considered cute and thoughtful?

it’s a long story but basically I screwed things up with someone I genuinely liked and cared for, and I had never felt anything for a person like I did with him and it scared me, he scared me and I kind of self sabotage and pushed him away. And for awhile I thought it was kind of his fault so I blamed him, ignored him, didn’t want anything to do with him basically then I realized i was in the wrong but it was already kind of too late to apologize since he stopped coming to the hang out spot, that was kind of the only way I saw him. Anyway he stopped coming to the hang out spot and just kind of sit at the steps or he’ll even just go somewhere else and I kind of take it personal like maybe he finally realized something or got a girlfriend I don't know but I just think either way it’s bc of me, I would think if he didn’t care about me at all, he’d still come to the hang out spot even with he does have one, like why would he all of a sudden not come anymore so I just take it personal. So anyway I’ve made up my mind that I will be moving and no longer will be able to come to the hang out spot and it’s got me thinking if he knew that, would he go there again. But before I move; I still kind of want to try and apologize and see if we could rekindle our friendship/relationship or something or even start over but bc he doesn’t go to the hang out spot anymore it’s hard to do that. So it got me thinking maybe on my last day i should stop by his work and buy something and hand him a note apologizing/letting him know I feel I just don’t know if notes are childish or not, he’s only 19 and I’m 22 so I just don’t know. He’s wise beyond his years tho what do you think, or even message him on Ig but I just think he would ignore me and or think I’m creepy
Is writing a note to someone childish or would it be considered cute and thoughtful?
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