Do you tell your partner you suffer anxiety depression?

ok ive been with my bf 7 months now, we talk a lot but he doesnt no i suffer depression and anxiety and take pills for it, i went off my pills at the start of the relationship but lost a lot of weight and now this week ive went back on them, ive been withdrawen ,not as chatty as i usually am, really really moody and horrible, feel more depressed on the pills and cant seem to `feel` anymore on them....im dalmed if im on them and dalmed if im not......ps. ive been on a few different types most of which havent gelled with me, i also told my x bf about my illness`s and i think it eventually broke us up as i was a burden. i want our relationship to be different any suggestions