How Do I End This Call Relationship?

If your whole relationship is based on - and that's all he wants from you, the I doubt he'll be hurt when you tell him you want it to end. He might be disappointed, but that's about it. The might be good with him, but you obviously don't feel good about the relationship on a whole and it's having a very negative impact on your life. Just end it ASAP, you'll feel a whole lot better.