As not knowing you or the side of the story from the other person involved,I can only emphasize that these people are not nogea bidavar and will not have preconceived notions of you. However you will have to make the first step or you will just not be able to rid yourself of the issues you are dealing with.
Aside from the school issue I can virtually guarantee that with the help of Hashem The Rabbi and Rebbetzin I suggested will help restore your support base at home even if your school issue cant be resolved just yet.Additionally I suggest again to be involved in a more positive atmosphere by perhaps partcipating in OhR Naava events or at least speaking to their staff as they should be able to lift your spirits.
Most importantly if the Rabbi and Rebbetzin or OHR Naava cannot help you they will be honest with you and guide you to who can and not waste your time.