Down and out

[Barkles]

I just feel talking to school or people around me they'll just laugh or say I'm over reacting... Or if I talk to someone at my school and word gets round... I almost feel like I'm dumb for thinking like this :/

Trust me, if your school is even semi decent they'll care. They have a duty of care while you go there, and mental health is one of the things they will be able to help with 
plus they work on confedentiality agreements, as long as you dont tell them your going to do something that could harm yourself or others then they can't say to anyone what you told them if you don't want them too
I've been told by my own best friend I was being stupid, so I know how that feels too. But in all seriousness you need to speak to someone. if you really feel like you cant talk to someone face to face there are websites that can help too, including offering people to speak with.