Is he a psychopath?

this man from my neighborhood has been flirting with me for like 1 year, i always reject his advances. ok, one could say, the flirting aint even that bad but: he suggested to buy me groceries, i said no, he started to carry stuff in his bag just in case he meets me . then randomly mentioned so and so told me you were around XYZ at 8 pm (i believe hes trying to threaten me, that he will always know where i am)
when i lost a phone, he wants to know when exactly am i going to get a new one. like for what? i know where to find u if i wanted to
i believe hes doing this on purpose because he knows damn well i am not itnerested in him romantically
i was lil bit warmer with him as we are countrymen abroad, we are even from the same hometown. he is like 53.
why is he so stuck on me and am i right he is alarming