I'm an AA guy, but in my first 7 years of sobriety I needed a lot of help with relationships too. I went to alanon, coda, and acoa and feel I got a lot out of all of them. Went to an artists group called ARTS anonymous too, which I'm not sure exists anymore. I know you said there was just one group around you, but you might want to search for other types.
Going through the 12 steps and learning to incorporate them in my life has been the most beneficial thing I've ever done for myself.
I've also worked on myself through counseling, group therapy, changing my diet slowly over time. I like reading lots of inspirational books too. It's amazing how life altering they can be if we actually apply the things they say
.