Moobs

I (22mtf) have been on hrt for about 6 months. Recently I made a joke about being skinny because I’ve always been on the skinnier side and he said I’ve got moobs and was joking about it. I’m mostly worried that he is noticing the changes from the hormones. He should be fine with my gender because he knows I’m bi but I’m scared of coming out to him. It’s mostly because he lost his brother this year from suicide and I’m named after my uncle, so I’m worried that since he is in a bad spot this is gonna fuck him up since he’s losing a second (my deadname). (They were very close from family issues so this hit him especially hard.) I’m scared that he’s gonna realize something is up but i also want to tell him first because I feel like he deserves that truth and I don’t want him to find out from walking in during the morning and seeing my titty while I’m asleep. What should I do?