Get a ring doorbell and see if you can use a WiFi booster.
I have a similar weird neighbour, he doesn’t tell people I don’t answer the door but he hangs around outside my door literally for hours.
He lives in the flat above mine then we have a communal entrance that’s right in front of my front door as a porch area. He stands in front of my front door that opens into my living room for hours at a time and hardly seems to sleep, he was out there between 3 and 6am this morning.
I have started spending the majority of the time in my bedroom at the back of my flat but I don’t really mind as it’s the same size as the living room and we have a tv and sky and a king sized bed so generally find it more comfortable with more privacy. My neighbour wouldn’t be able to hear a thing when we are in the bedroom so god knows what he gets from it!
I got a ring doorbell fitted when he started being even odder and moving my parcels left in the porch and friends and even the postman noticed him constantly hanging around. He went absolutely ballistic about the camera but I finally had proof to pass to the police, on one occasion he’d spent 7 hours hanging around with the occasional breaks he where he went outside to smoke or briefly returned to his flat. He spends far more time outside my door then in his flat he pays rent on, he’s even put a table and chairs outside the communal front door so he can open the porch door and sit outside for hours on a sunny day but still be outside my door.
He was arrested and I had a good 5 months when he was on bail and left me alone but as he hasn’t been directly threatening (verbally or physically) and don’t have proof of him damaging property or doing anything they can actually arrest him for the CPS wouldn’t take it to court. He’s clever enough now to stand just out of sight of the camera but so I know he’s there, as it’s communal no one can do anything.
I have reported him to the landlord repeatedly and for making noise and other strange behaviour but he comes across as a sane, reasonable and decent person, I think the landlady is just starting to see through him.
Now the camera makes me feel a bit safer that he’s not going to try to enter the flat or get too close to the door as he’s aware of it and hates the idea of it picking up any footage of him, he fought hard to contest it for breach of privacy but was told he’d only appear on footage if he came too close so to stay away!
He has started hanging around and shouting outside my kitchen window as I’m on the ground floor and the camera doesn’t pick it up, he’s absolutely unhinged but my flat is perfect for me and I’m not moving. It’s been going on for 5 years so unfortunately it doesn’t seem he is either.
He has a partner who we can hear him being abusive and violent towards, I’ve reported it countless times but his girlfriend denies it, it’s sad seeing how broken she’s become. My partner has tried reasoning with him but he tries to start a fight and he scares us, I don’t think I could live in my flat alone.
Don’t let it escalate OP, get the camera and as much proof as possible, if not a ring then look at something like a nanny cam. Update your delivery notes not to drop any packages with neighbours and try to catch and drivers or the post person so you can tell them directly.
I’m currently in a dispute with Amazon after shampoo and conditioner were delivered to my neighbour by accident and he left the open parcel at my door with the seal on shampoo and conditioner broken, no way am I using it now 🤢.
I don’t know if your neighbour is as creepy as mine or possibly just fancies you and is making excuses to talk to you but it doesn’t matter. Keep a diary too, the police took my complaint a lot more seriously with it all documented.