I do I go about seeking help?

Ok, im 16 years old. i live in a family where do do not express ourselves or really talk on a deeper level. i think i might need some counseling. somebody to talk to. ever since i started high school, i've been so unhappy its starting to become unbearable. Im not suicidal or anything but if things don't drastically change, i might be in the future. Ive become a completely different person. i worry about a lot of things, i became very mean to my family members and i find myself not being able to control a lot of my emotions. i don't have any friends so i cant talk to anybody about this. how would i go about asking or persuading my mom that i need counseling. my school does not offer counseling btw, i checked. I don't want her to think im crazy or look at me different. she probably wont believe me anyways.