What should I do about myself and my mom?

Right now your mom needs you. Make sure that she is seeing a psychologist so that she is continually getting better. It might also minimize suicidal episodes. You should stay with your mom, while it might be embarring this is a sacrifice you need to make for her. As for the dating topic, i am sorry that girl backed off, but don't let that stop you from leading a normal life. If you let any of this interfere with your life too much you risk becoming bitter to the whole situation. Things will get better, it is only a matter of time.