I'm so sorry your poor bunny is grieving. It's such a shame you can't afford another rescue. My Ginny was one of a trio. She started off with her sister, then we introduced a neutered male who was widowed. Then after 4 years Ginny lost both of them within 6 months. She was so depressed and struggling to show interest in anything, she was 7 yrs old. We rang rspca and they found a 2 yr old grey lop, Widget. He had been a "seized by the inspector" bun. I spent about two weeks carefully introducing them and eventually they got together. The change in Ginny was amazing, she got her smile back and her zest for life. We're now a year on and Ginny idolises him, although she's in charge, Widget is very happy with the attention. As Ginny had never been alone before it works very well and I'm so glad we took the chance. I'm sure it saved her life.