I need help letting a guy down

I've been talking with this guy for at least a month by now, I invited him over to stay the night and his whole demeanor was off from what had come across in videos and texts. He has already began saying he loves me (to which I just say thank you as I don't want to say something I don't mean, it kind of feels like he's trying to corner me into it.), and has an insta photo of mine as his phone backgrounds.

He was a tad too...off in person. He talked to my housemate about "rooting me" in a very locker room way, and doesn't know if he's queer (despite seeing me?). He is also a person who engages in illegal activities a lot (speeding, breaking in, stealing, drugs), which I didn't know the extent of. He is also pretty proud of being an agressive person. He's also been sending me messages with the vibe of "I have nothing left but you, please don't take that from me"

I am terrified to let him down. My plan is to slowly lessen how much I talk to him and come up with excuses not to have him over again. I feel like if I say it outright he's going to break into my house to "talk".