<human>: I'm looking for some advice here guys, I have never been in a situation as messy as this and don't know what to do...

Let's start at the beginning, the very beginning:

I have a really good friend who we'll call 'K', we've known each other for years. He met a group of people at a place called Portrush and started to hang out with them when he was up at Port.

So fast forward maybe a couple of months to where this girl (who we'll call 'C') added me on facebook, she was one of the girls from the group of friends K had met up with. We start talking and exchange numbers and stuff, hoping to meet up soon and get to know each other a bit. We don't meet up for about a month but within that time I start to develop feelings for her (I know, I know) and I find out she kind of likes me too. Although I also find out that her and K had a bit of something going on too, nothing serious, they would just meet up and go with each other (N.Irish slang for kissing) when K was in port.

So, at the minute the situation is myself and K both like C and C sort of likes me and from what I know likes K...

Time goes by and we finally meet up (less than a week ago), it's her and her best friend (who shall be called E), a whole pile of my friends and me. We go and sit down on the beach and C and K start cuddling up to each other and eventually going with each other. E comes up to me and does the same, even though I don't really like her.

So basically, me and C like each other but she also likes K who also has a girl back home he's pretty friendly with which C doesn't know about and E has a boyfriend which she thought I didn't know about... 

There's many more small details and conversations that went on between me and C and I just don't know what to do at this point...

If you need any more details just ask and I'll try to answer as much as possible.

Thanks in advance.

Summarize the given text in a few sentences.
<bot>: I like a girl who likes me and a good friend of mine while her best friend also is crushing on me. What do?