How do you deal with being the third wheel?

I would probably ask them to stop or just get up and leave (if I had driven myself there). Friends who are inconsiderate don't last as friends long in my world.

Doesn't have to be dating, but if I find I am the extra wheel, or no one is having fun or indecisive, I'll bail out of those situations as well. No reason being miserable.

Ooh, that would be incredibly awkward. I don't even think that I'd like to sit near anyone whether I knew them or not when they're making out in the movie theatre. As far as lovebird01 says, sometimes you can't always predict some things because you don't always know the circumstances.

I was the third wheel on one occasion when I went out with two people that were going out and I didn't know (they were keeping it a secret) although it did feel weird and I didn't know why. It was strange because I could feel that something wasn't right with the situation, but I couldn't say anything without embarrassing anyone. I was with two foreigners (Swiss guy and his South Korean girlfriend) that were at the place I work and we were visiting all the sights in Cape Town. We were at Cape Point (where the Indian and Atlantic oceans meet) and I thought that I was showing them the sights of the most beautiful city in the world. Apparently not. It was fun, but it felt weird. Erg, I never want that experience again if I can help it.

No, this never happened to me. But, I guess you should have anticipated this, since you went without a date with a couple. You were kind of the third wheel from the beginning. Take your own date; that's the only way to deal with it. Or go by yourself.

I'm quite often the third or fifth wheel. My friends are well-intentioned to consistently single me. I don't hate 'em.

Being the third wheel is very very awkward! I would know...lol
but I deal with it by texting! I know weird but I text my other friends.. or I usually just bring another friend with me .,.. sometimes a guy sometimes a girl... because when I bring someone along... we can ignore the kissing and lovey dovey stuff...

That was a bad move on your friends part. She should have realized how awkward that was going to make you and could wait until later. If she asks you to go with her then she should pay attention to you. I go out with my friend and her boyfriend on occasion and they always include me but I know to give them space and do my own thing. At the movies for example, go get a drink. At a bar, go meet some new people. At the mall, say there's a certain store you're going to run to. Or you could always bring a friend. If you give your friends some space they should respect you and not make it awkward.

Thats kind of rude of your friends. I sometimes go out with my best friend and her guy they are totally solid they dated for a while they aren't making out when I am around they can do that when I leave.