Dying Soon

(22f)So I'm killing my self on new years and I have one main issue. The main thing keeping me here rn is my boyfriend but honestly I can't keep using him forever just to stay a float. He knows about my mental issues and tries the best he can but I can't be helped. Should I just break up with him and then end it or should I just spend the rest of what little time I have left with him. It makes me feel guilty to hang out and spend time with him cause I know I'm just gonna be gone soon. There's also the fact that if I do break up with him, he'll know that I'm suicidal and planning on killing my self. He would try to stop me and I wouldn't be able to stop myself from losing it on him. I have no clue what to do.