Can somebody help me figure this out,please?

[angel]

Okay,so my boyfriends bestfriend (let's call him Sammy) has been acting strange lately. He's been calling me a lot,like 3 times a day,and each convo is like an hour long. He wants to talk more,but I barely have enough time to talk the way we do now. He also talks to me on facebook constantly and gives me compliments on how f***ing amazing my personality is. Yesterday,my boyfriend posted a status about how much he loves me and his friend flipped. He told my boyfriend that he either needs to stop posting those statuses or he's going to block him...Harsh. As if all that wasn't bad enough,he started telling me stuff about my boyfriend that I know for a fact is NOT true at all. It's almost as if he wants me to be mad at my boyfriend...plus he's been totally blowing my boyfriend off lately. My boyfriend is getting extremely jealous because "Sammy" calls and messages me all the time. My boyfriend thinks he has a crush on me,but he talks about this girl named Hanna all the time,so I'm pretty sure he's into her.What's up with him? And what should I do? I'm going crazy!