You say you are sure you will not get laid, you say that you don't want to fuck this good looking female friend of yours, yet you ask us what you should do in this situation?
If you really don't want to do anything, then you don't have them over. Period. Her, her friend or anybody that you don't like shouldn't be in your room, especially in your bed.
Now if you are just trying to be passive aggressive and find out how to do so without actually asking, because you're a sissy and want as many ideas as possible...
You let things take their course. Do not insinuate, imply or suggest anything. No sexual remarks, don't get in bed then do the "yawn & stretch," or you don't wear 4 layers of clothes on a 90* day sweating the whole time but only ask to take the clothes off when you get in this so-called "hot room."
See how they lay down, if one is on each side of you...that's a plus. If not, you have something of an answer- but of course, you don't want to fuck them! Watch the movie, or lay there and play stupid....treat them like they're your GetBig acquaintances and be brash. Don't puke, fart and scratch yourself right in front of them (out of the room is OK tho!)...
...mess around tickling them and see if they respond. If not, your OP is no problem. If they do...well, you're not fucking them anyway.