<human>: Summarize the given text in a few sentences.

24/f in a relationship with a 23/m. Relationship for ~6 months.

 Over the past couple of weeks my guy friend, who lives states away, has become increasingly unstable. I went to school with him and he moved away for grad school. I care for him (non-romantically) but lately he's been hostile, resentful and manipulative. We've always been able to have platonic discussions and use each other as a sounding board, so losing that has been difficult for me. 
About two weeks ago he mentioned that he was thinking about moving back and then went on to express his interest in me and asked if I would leave my current relationship for him. I told him no and basically friend-zoned him. Things went downhill after that. He started sending texts that went from borderline inappropriate to downright erotic. I never replied but they kept coming. I've never discussed anything inappropriate with him and our relationship has always been completely platonic.  

Last night, while spending time with my BF my cell phone went off and he asked who is was. I had received 10 nonreciprocated texts- which ranged from inappropriate to threatening. I was intoxicated and knew I couldn't explain the situation adequately so I shrugged it off and changed the subject. 

Today I sent my "friend" an email and explained that I was in love with my boyfriend and had no desire to have any sort of relationship with him beyond friendship. After a hostile/inappropriate response I made it clear to him that I was done and all contact should cease. He agreed- but I doubt his sincerity.   

Should I say anything to my boyfriend? I know I can handle this on my own and I don't want to *bother* him with it, but I'm a little scared of what comes next. I feel like I've done everything I can and I have no control over the situation.
<bot>: Guy friend from another state becomes hostile and inappropriate after I friendzone him- do I say anything to my boyfriend or will that just "stir-the-pot"?