questions with no answers

Do you ever want to be something you know you already are? I am witty, funny and sarcastic with my friends but I can't seem to be that way here.I think weird thoughts and I like that about myself. For example: we learn our colors in school. Red is red and everyone knows it is red, right? But how do I know that the color I know as red isn't seen by my eyes as green? As different as we all are and our bodies are how is it possible we all see the exact same shade? Isn't it more likely that we recognize the colors because we are taught a certain color is red even though I might actually see green? These are the types of things I think about, useless possibly but at least I challenge myself.

Now on to a problem. I have a person I used to be friends with. She is the type of person who has to have all male attention at all times. She finds out you are interested in someone and she begins flirting, though badly, and it pissed me off. We are no longer friends and of course I got married so it is not even an issue anymore except that it is. We have a mutual friend who has now moved in with her and is forcing her on our group of friends. Now they are throwing a party for Halloween. Jason thinks we should go. Part of me agrees, but I don't want to at the same time.I don't trust her at all and don't particularly want her and Jason in the same place where she can flirt. I am not worried about Jason cheating on me, I trust him completely and he finds her rather vile but still...I just don't want her even talking to him.

So tell me dear readers, am I just clinging to the past or is my fear legitimate? BTW she visited him at work on day after she had only met him once. How do I handle this with my friend, I don't want to lose him but I find her repulsive and choose to not associate. What should we do? How should I handle this situation? Should we attend said party or not? Should I say something or not? If you are reading this, please respond.