I have a guy friend that was initially really nice, we got on so well. He asked if I was single and I said I wasn't. He asked how long we'd been dating, I told him and that it was an long distance relationship etc. Anyway, he started becoming really flirty and asking to meet up. I said it wouldn't be appropriate and when he kept asking me every single day when we're meeting I had to keep thinking of excuses. He always asks to call as well and I decline. I said to him look I will tell you when we can meet (so basically never will), but STILL he pesters me daily saying 'hey when are you free?', if I say I'm busy with coursework he'll say 'no you've got time' which really annoys me.
He also keeps sexting me at night, sending me shirtless pictures saying 'I know you fancy me', saying how he wants me in his bed and wants to do sexual things to me. I said I don't like this conversation, it makes me feel guilty, I have a boyfriend I'm happy with, but he says 'I've taken girls from their boyfriends before, be with me instead'. He even says things like 'what if we can't control our urges when we meet?'. 1. We aren't ever meeting. 2. I feel no urges, he is immoral and a 'snake' basically, I have no respect for him and I love my boyfriend.
I've deleted him from all social media. If I tell my boyfriend, I don't want him to get mad at me, he might start getting suspicious of the other guys I talk to and judge me for the friends I make. What do I do?