spider in my room

When I woke up this morning, I found a big, fat, ugly spider (mind. 1 cm gross) in my room.

I wanted to kill it, but my hostmother came in and said: Don't kill it. It doesn't hurt you. It catches the mosquitoes und kills them.
-> I hate mosquitoes. There was one in my room and bites me last night!!! *grrr*
... and I hate spiders!!!

But during I was talking with my hostmother, the spider ran away and hid somewhere, so I couldn't find it anymore. Finally I have to share my room with a spider!!! *crying*

Spider, don't matter if you are a pig or a man -> I'll kill you!!