Wow those are terrible things for them to say...do they tend to say things at all like that when they aren't exactly angry? If so it sounds like they are emotionally abusive so if at all possible finding ways to distance yourself from them would be a good idea do you have any way of maybe moving out or staying in dorms or something?

Aside from all that though if you're considering suicide...then I recommend getting help ASAP, like if you need to go to the ER do it...because you're worth that regardless of what those jerks say.