Okay, so there was some guy i met, and he seemed nice cause he bought me food and even got me a gift.. and as i stayed there for a week, he did things that were red flags. like, he told me he had a way to see who his ex texted, and called.. and he even said he knew how to upgrade phones, and when he asked to see mine, he texted some of my guy friends saying that he's my new friend and to not contact me anymore. he even told me not to text them either, or it's over. then he'd talk nice and try to hug me sometimes. so after a week, i asked if i can go back to a sibling's house, and maybe see him another time, and he said it was fine. but when i got back, he said i just used him and that he won't contact me anymore.. but he kept sending messages saying i'll regret it, and no one will treat me like he did.. it just scares me.