He said he’s going to kill himself

I’ve been with my boyfriend for a year and a half and i start to wonder if i should break up. At the beginning, i accept thing that he was doing that hurt me a lot. These thing completely ruin the confidence that i didn’t have at that time. Now, i still don’t love myself and i think that you can’t love someone if you don’t love yourself first. So for the past month, i tried to break up with him. The problem is that he is completely in love with me and he thinks that i am the love of is life. I think that too but i think that i shouldn’t be in a relationship right now and maybe, after one year or two i would be ready to have a relationship. When i’m trying to break up with him, he can’t accept the fact that i want to be single and he start crying a lot and he’s saying that he is going to kill himself. I don’t know what to do because i don’t want him to kill himself just because of me.. so i stay in a relationship that i’m not comfortable in and at this point, i cried every night and i began to be depressed. I don’t know what should i do now.. can y’all give me advice or share a similar situation to mine?

EDIT: i just want to thank all the person who took their time to respond to my situation. I wanted to thanks all of you personally but since i want to stay anonymous i prefer to do it like this. It is extremely appreciated and it helped me took a decision.. i send love to all of you and thank you💕💕