Hi,
I actually fully understand how you feel. I lost my 2 Angels within their first year and I can quite honestly say it was the worst experience ever, as I lost my male first then shortly after his sister. I got them both from an accidental litter, my first pets for me and my partner in our new home. I had so much love for them both and literally broke my heart when I had to say good bye.
In the short time after Harvey passed. I ended up rescueing a new little male, and at first being honest I hated him and ever time I looked at him just felt guilty, not wanting him and just wanting Harvey back. But I knew deep down honey needed a friend. Anyway, shortly after honey passed away.. Again I blamed my new bunny Bailey. Saying if it wasn't for him, maybe I could have concentrated more on honey and prevented her getting worse. But all the time I had all the wonderful people on here me so much. It's scary how much they quickly creep into your heart!
What I'm trying to say is it took time, and with some it will take longer than others, but you've got to try and think of it that your helping other bunnies and your past bunnies are they're keeping an eye on you all. With Bailey now, I love the little cheeky money so much and wouldn't be without him. Sometime I do feel why bother having animals and that they are a burden, but when you see their little faces when you come home, I know he was meant to come to me.
I've recently taken on another little girl as again I felt it was unfair to keep Bailey on his own, I got bella about 6 weeks ago now and being honest I still struggle. Every time I see her, I just think about honey and again wish she was here. I know it feels like your replacing them, but your not! Being honest, I still don't really love her yet.. She's just there as a friend for Bailey. But I know deep down she'll grow on me and soon creep into my heart before me knowing. Honey and Harvey will always remain in my heart, and I've also got them tattooed on me! (Mad women I know) but Bailey and bella will never replace them, they are just more bunnies that deserve a happy life which I will give them.
I'm sorry for the essay, but I can honestly relate so much to you and just want to say give yourself time. Also as for it being over a year and a half and you still don't feel much for them, touch wood this never happens.. But the moment they show signs of illness or look sad, your heart will just kick in and feel so much love xx