my (20f) neighbour (65m) is making me really uncomfortable

I apologize in advance for any mistakes or if this is the wrong sub, I?m fairly new to Dating.mobi!! Since I was 18, my next door neighbour(herein named John) has seemed to take an interest in me. at first, i assumed it was because he?s lonely - he lives alone, no kids, etc. but now, it?s gotten increasingly weirder. Every time i leave my house, John is there. Every time i get home/park my car, John is there. And, every single time, John makes a creepy comment/action that makes me uncomfortable, all while i?m alone. he never approaches me or talks to me when my family or friends are around. To list a few examples: - John told me that and i quote ?if i felt like a bad girl, i could come over anytime? - John blows kisses at me every time he sees me - John told me that if I ever wanted to ?get rid of my brother (16m) to come over and borrow one of his guns? (he has a locker full of them) - John will give me a hug any chance he gets (obviously with COVID that?s not happening anymore thankfully) My dad tells me that I?m worrying for nothing, John is harmless, just an old lonely man. But John gives me such a bad feeling, I feel so sick when i see him, like alarm bells going off. I just turned 20 so i?m feeling extra vulnerable and like i?m not brave enough to tell him to back off. Moving out isn?t an option, I?m still in school, and I?ve tried nearly EVERYTHING (ignoring, avoiding, etc) Does anyone have any advice? Please help a girl out!!! Even if someone has advice on how i can calmly and still politely assert my boundaries, i would really appreciate it!
TL;DR: my old man neighbour is making me very uncomfortable and I don?t feel brave enough to tell him off


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