She will need to spend a lot of time with the rabbit. You two have a strong bond (you and the bun lol) and it will take some time to get her warmed up to your girlfriend. She should spend time on the floor at the bunnys level for at least 1-2 hours a day, and feed any treats/ veggies by hand. She should always be calm around the bun and never try to pick her up. Other than that, time and patience is what it will take!

Sometimes bunny’s just pick a favourite person…of course the more nice things your gf does (feed treats, play with toys, pet her if she likes that) the more chance there is that your bun will develop a relationship with her. It’s not guaranteed tho – my bunnies aren’t really fans of my partner and we’ve had the bunnies for 10 months!

Have her sit on the floor with the bun and not attempt to pat her or touch her. Just lay there. The buns natural curiosity will eventually take over. If she doesn’t try to pat Mable, and just lets her explore, Mable will probably go near her more. When Mable is more comfortable, she can do a few pats then stop, that way Mable gets used to her touch.
Some buns just bond better to the person who was primarily taking care of them. My boys will let me nose rub and pat for hours. I also clean their cages and feed them and spend more time on their level. My husband will try to pet for a bit, and they hop away after a few minutes. He also isn’t on their level enough or doing a ton of stuff for them. They just know.

I second the others as well! My buns are much more receptive of me than my husband. He would rather do something else around the house… I would rather snuggle on the floor with buns! I think they can sense that I truly care about them and they know they are safe with me

Side note: Asriel & Bombur I have never seen your buns til now!!! So adorable!!!

Letting her give your rabbit the treats and food will help a lot. You’ll need to let her know she needs to spend more time with the new rabbit! It’ll take some time, but a rabbit’s love is never only limited to one person.

I think it will definitely take some time, but I don’t think you should isolate yourself from bun! She’s obviously very attached to you so you don’t want to “offend” her. I say it that way because sometimes my bunny literally acts like I’ve offended her. Sometimes I get rabbitude if things don’t go her way! Maybe you can help foster their relationship. If she snuggles up to you have your gf sit next to you and you can start off petting her but then transfer petting rights to the gf. Maybe bun will notice, but maybe she wont lol

Wait, unless by best friend you meant your girlfriend not the bun XD

Thanks BunNoob they’ve sadly grown so much since then. Almost senior buns now!

I agree with everyone else about feeding her by hand. That’s how I started getting Asriel’s trust, as he was a very shy bun. Now he’ll sit with me as long as he’s out.