Personal Relationship Issues

I am okay if you are clingy or possessive or whatever it is about yourself so long as you have enough decency and understanding to notice whether actions caused by said traits are making me feel uncomfortable or upset and not doing said actions.  I am willing to talk and help come up with alternatives if necessary.  What I am not okay with is using said traits as excuses to get in my personal space and to start pushing other people that try to interact with me in public and hug me while screaming "MINE".  You are not five.  You can articulate yourself better than a sea gull.  If I have already rejected you, please do not try to kiss me.  Please stop getting upset when I tell you that I do not want to hug you, or I do not feel like talking, or you're being clingy.  Just because I look depressed all the time doesn't mean I am all the time, nor does it mean that I can't get upset.

I really needed to get that out of my system.

I've been facing some personal issues at school.  I feel incredibly disgusted by the actions of a few people, but I cannot call them out due to the fact that all three have gotten upset due to be called out on their actions before.  I know that, highschool being how it is, I cannot afford to make people upset.  While I am in highschool, I will be forced to continue interacting with these people, taking classes with these people, working with these people on projects, and asking these people for help, and strained relations in these situations are unbearable to deal with.  That is one of the reasons why I have chosen to abstain from relationships in highschool: the ensuing mess of a failed relationship is too much to deal with, especially when there are more important things that should be focused on.  However, it seems that such drama has made its way to me even with my efforts to stay out of such things.

I am also uncomfortable with confrontations.  It's just how I am.  I have issues talking directly with most people and fighting back against people in general.  I dislike unnecessary attention.  That makes me a prime target for bullying, of course.  I usually ask my close friends to help me.  However, in this situation, both people are within the circle that my close friends and I are in and both people will get upset no matter who the statement is delivered by.

I am really unsure of what I should do in this situation.