How to rekindle the spark...should i even bother?

You, again? Well you gave more detail this time and i can see how you are at your wits end. My advice is still the same, get a spiritual advisor, spiritual mentor. Someone to lay hands and pray for and with you both and individually. Sounds like you both could use a mentor. If you choose to stay and work it out and it sounds like you have based on your previous post that you are in counseling, then give it a fair chance and be open minded. Your problems are not going to fix themselves or go away over night. This will take time, but progress is the key. That and communication. Good look girl.