I am so confused && worried && idk what to do... HELP!!?

Okk well I went to a party today cause it was my bestfriends birthday. Well my boyfriend knows that she does **** like weed && bars & he said he didn't want me to do that && I promised him. So my bestfriend grabs my phone and texts my boyfriend say random things && he was like oh your on something what are u on ( I didn't know she had my phone) then she calls him mumbling as if she was high && he thought it was me so he got all mad at me&& he texted me saying "since u can fun with that crap I guess I'm going to have tonight".. He is currently at a party && there is no way to get a hold of him && as soon as I found out about this I texted him right away to tell him what had happend. He is pissed at me && won't answer his calls or texts ... I thought he trusted me && now idk what to do :|