my partner is experiencing a depression episode and i don’t know what to do

my partner (22m, BP2) and i have been together for almost three years. we’ve lived together half of that time. he got diagnosed with bipolar 2 about two years ago. up until now, i would say i have been pretty good at understanding how to support him, instinctively. he has had depressive and manic episodes on multiple occasions during our time together but this time is different. it’s lasted nearly four months.

since January, he has experienced several alarming situations ranging from a falling out with his brother to a medical scare concerning his heart. he was taken off of one of his medications during this time to investigate how it affected his heart. he also endured a very traumatic event in March several years ago so that month is typically hard to get through anyway. 

i can definitely feel the wall he has placed between us as he is attempting to navigate this season - especially because we’ve had NO physical contact since the first week of February (expect for one encounter last week that he initiated). he has since pretended it didn’t happen. 

i HATE bringing up my feelings and how this has affected me because i don’t want it to seem like i think my circumstances are any worse than his. i know he is going through so much right now. but so am i. i feel so helpless and alone. i feel unwanted because of how he has not been able to show me the physical attention i need. i just feel lost. 

on top of all of this, we’re due to get married in a few weeks. i am absolutely 1000% in love with this man. i can confidently say that i want to spend the rest of my life with him. i am not going to leave him. i know that much. however, it worries me when he tells me ‘i am numb and don’t find enjoyment in anything’ right before we’re getting married. it makes me feel like he won’t be able to enjoy the experience.

i know i probably sound rambly but i have no one to talk to about this. any advice or even encouragement is appreciated. thanks, guys.