I need real help with a girl!?

So some really really hot girl wanted to hang out, so we met up at a skating rink. Well, I use weed, and I smoked right before and I was high as a kite, and then I got to the skating rink. So I'm there with this hot girl (we'll call Sarah) and one my friends (we'll call Erin) who is friends with Sarah, and my friend Erin knows I do weed, she does it sometimes too, just not as much as me. So Erin knew I was high and got mad at me for being high. She then told Sarah, and Sarah got mad because Erin was mad. Sarah is a bit of a Slut..like I'm not trying to be mean at all..but she got an 18 year old boy in jail for having sex with him since she was 11. But she still let's guys all over her. Even me, I hardly know her, and she's got her hand on my thigh and stuff. So me being high, was trying to convince them that I wasn't high, which is really hard to do when you are. So my friend Erin and Sarah are both mad at me, and I need to make Erin happy first, so then Sarah won't be mad. I really want Sarah and hopefully I can help her..I know it sounds dumb of me, but I like feeling like I have a responsibility, that why I have a girlfriend. So any ideas of what I can do to get them not mad at me? Oh and don't say anything bad about weed. At all