if you're skinny, make sure you eat enough. otherwise, just accept it - it's nothing to be ashamed of

if your school has counselling, try to go to it anyway. this could be the most important; but I don't know you.

see if you can find something to motivate you - an activity; a hobby; a sport. That might give you something to talk about if you really don't feel you're interesting. you might meet some people who share your interests and find you interesting,

the homophobia thing - that's awful; i guess, just keep going until you can be more independent. hopefully someone else has more experience to give info

but i don't know. Things can be difficult a lot of the time, but they also can get better

i hope things do for you