Hi looking for some advice/shared experiences. This may be long so thanks to anyone who takes the time to read 
Depression has started up again after a very long time doing well so just back onto the anti-d’s.
I’ve been in a relationship for the last 2 and a bit years, all good, it’s very healthy, trust, communicate well, most definitely the best I’ve been in but I can’t help but feel like cutting myself off from it. I avoid meeting up, making future plans, text/phone less and find it really hard to be affectionate. These feelings coincide with when I started to suffer with depression again.
For context, I got a promotion at work and was non fazed by it, just got on with things no passion. I have a hobby that I used to take seriously but again, lost the passion for it, can’t be bothered. I do the bare minimum appearance wise and most days are spent waiting for the day to end so I can go to bed.
I guess I’m just looking for reassurance that this is a knock on from how I feel in general and not a case of my relationship has ran it’s course.
How is best to move forward? Should I let the meds work (successful before) and give it time or have I genuinely just fallen out of love?
Partner would be supportive, I just haven’t opened up about how down I really am. At the same time I don’t want to hurt him saying I don’t feel love if it’s just a feeling brought on by depression and not actually anything within his control.
Has anyone had depression, took steps to manage it and saved/bettered their relationship in the process?