My advice is tell her everything you just told us. That was beautiful. I am married and it took my husband a while to understand what it was we as empaths endure, and how much it affects our relationships.
Be mindful though, you cannot place all blame on yourself. In a partnership there is give and take. She may need space, and as you try to understand that, if she is fully in the partnership with you, there has to be time where she understands that you desire her affection and attention as well.Have you thought that maybe she left because she can't give you what you need? Being empathic is deeply sensing and it is possible she may have felt that you weren't getting everything you need either.
Talk to her.