I decided to go browsing through my favourites on ff.n, and this is what I turned up that I think would fit your criteria:
I'd recommend most of
Kaoruhana's works. Ratings vary from M to K+ on those.
Another fantastic author is
fringeperson. She has written in a HUGE number of fandoms, and I love most of the stories that she's written in the fandoms I follow. Ratings vary from K to M on the full collection of stories, but the Inuyasha stuff is all between K and T, although I suspect that my favourite (Trapped Together) might be rated M here.
There is a huge variety in
Kanna37's works. If you are willing to try alternate pairings; then I highly recommend any of her KagomexInuPapa stories. On the SK stuff, "In Death, Trust Me, As You Didn't in Life" is amazing, but the first two chapters make me cry every time I read it. "Windows on the West," "Bitterly Yours," "Sweet Betrayal," "A Winter Wish," and "The Flower Girl" would also fit your criteria (I think). If you like InuyashaxKagome, have a browse there too. I'm not a fan of the pairing, in general, but I like how she writes it a lot of the time. Beware genres and summaries though, because Kanna also writes stuff that fits in the controlling category. Most of Kanna's stuff is M or MA.
A wonderful PapaxKagome story is
Fangs of the Father by Umei no Mai. Rated T on ff.n, but I suspect it would be M here. Lots of great SK friendship in this one, and she has an interesting take on most of the series main characters and their relationships.
Luna-magic-2005 has lots of wonderful, sweet, funny stories - a lot of her oneshots have ended up in my favourites! Ratings vary from K to M.
Fourshotchild has two SK stories: "Rosetti's Romeo" (rated T) and "The Black Dog" (rated M).
I'm of two minds on recommending
The Weight of Memories by minerva-one because it can be sad, but it's also about the healing that comes through/afterwards. Rated T on ff.n.
Two minds on TiggyToggy's
Finding Her Strength (M on ff.n, but I think MA here) too. It's a story with Sesshomaru past and Sesshomaru present. The two characters are very different in their relationship to Kagome. Sesshomaru present has a healthy relationship with Kagome, Sesshomaru past does not. There's a lot of angst in there, but they all get through it. There's also a lot of Kagome being wronged and learning how to put people in their place!
Last, but not least, if you're willing to try a crossover, I recommend
Daddy Dearest by Bunny.W.K (rated T). This crossover is with Avengers and meshes Kagome's return to the future after Naraku's death with the first(?) a Avengers movie. I laughed a lot reading it, but it isn't all fun and games. Some SK friendship in there, too.
I hope there's some new stuff in here for you that helps to lift you up! Tough times are tough, and even more so when you feel alone in them. I've been there too, and stories have been my refuge for the majority of my life.
And just to put it out there, all the M and MA stuff mentioned is not for YIMs!