Question

I would say: "We all need help, especially me, an orphan." If you are going to include yourself in the sentence don't use they use we because if you say they you are making the sentence about someone else and not you. For example, "They all need help, especially the old woman." You see, in this sentence using they in the end you are talking about someone else and not yourself. 

2) Let us say your friends ordered a few pizzas for a get-together but ate everthing(or ALL??) and din't leave any for you. Would it sound odd to say to them: "That's messed up", "That's rude" or "That's bullshit/lame"? What could I say?

No it wouldn't be odd but I would say it like this:

Guys! That's messed up! Or, Guys! That's rude!

The last two are a little odd because that's bullshit is a little too mean and that's lame just doesn't make sense in this situation. I would say that's lame to a bad movie or show. 

Thank you