So last night me and my fiancé was talking. He started by telling me how jealous he was because he…

So last night me and my fiancé was talking. He started by telling me how jealous he was because he realized he kept asking me the same question about the same dude "who is he" and he is my cousin. Then he told me how scared he would be to get his heart broken. Then i told him how crazy that was because he has been breaking hearts. So he asked "I didn't break your heart....did i?" I didn't want to lie so i told him yes. After that everything was quite between us and he didn't even eat dinner with me. Now this morning i see post he put up saying how he a fuck up and is just gonna give up on life etc. What should I do?