Your comment about feeling useless struck out for me. Because I recall way back when I discovered PC I was in such a sorry state that all I did was ask for support. I felt badly about doing so. But I was unable to give back at that time. Eventually, I hit upon better times (I'm on a roller-coaster ride...) and was able to offer feedback and support.
There are days when I come here and cannot find it within myself to give, as I myself am so depleted. And I have learned that it's ok. Yes, it's OK. The people here certainly understand that.
Besides, by allowing us to support you, provides us with the pleasure to give to you, and providing us with pleasure is far from useless imo! Honestly, sometimes I want to give, and am grateful for the opportunity to offer some words of support, encouragement, or understanding here.
And yes, please tell your t what kind of response you want from him/her. Otherwise he/she's left to do what he/she feels is most helpful. And you may or may not like that.
Take gentle care,