I feel incredibly lucky that the dynamic of the friendship between me and my two very closest friends works on the basis that we aren’t in constant communication with each other, and there are no set expectations around how we “show up” as friends. Instead we all know that, when the chips are down, we will be there to help and support each other through any situation - whether that support is practical (lifts to places, babysitting young kids at short notice etc) or emotional.
We each understand and respect that how that support manifests, and which of us is doing the lion’s share of it, will naturally ebb and flow depending on what we each have going on in our lives, but over our almost 20 year friendship, the individual effort made has broadly evened out across our trio, meaning no one is left either feeling taken advantage of or feeling guilty.
That said, not all of my current or former friendships have been like this and, as someone who has often been the person putting in most of the effort and often not having it reciprocated, I do understand why you may be struggling with whether you can continue with the friendship, either in the same vein or with some new parameters/boundaries in place.
My advice would be to not rush into making any decisions when you’re feeling the worst of the “sting” from her rejection/disinterest. If you are in a bad place anyway and therefore under a lot of stress, it’s unlikely to be the optimal circumstance for you to make any big decisions on the future of a significant relationship. Give yourself a bit of time to reflect. It maybe that the space confirms that your instincts were right and you walk away. Equally, your friend may realise you’ve felt let down and respond in a positive way that allows you both to reconnect and the friendship to rebuild.