First off....you are by nature a very warm person....that is a quality. Having said that, never let others drain you...and often it is unintentional. I have learned over the years that sometimes it is okay to be selfish, yup...I said it. Selfish meaning taking good self care, not allowing toxic people into your life, to establish boundaries so that you are not emotionally drained by others...just being aware of your own needs and honoring them. Sounds like you are on the right path