(((deadend))) I'm a true believer in avoiding "missionary" dating to save the other person at the cost of sacrificing your own mental health and happiness. You have needs of your own that are not being valued and the relationship sounds one sided. If the other person is not building you up they are pulling you down and most likely using you on an as needed basis. Don't continue to offer yourself up like that. You sound like a fabulous and caring person. There are many others in this world who would be willing to treat you with mutual respect and kindness.