Repeat Relationship

How do you tell a person with out hurting their feelings that they are not what you are looking for. Do you just be truthful or drag it on. But I do think this person knows that I am not digging everything they do, or say. they just hanging around to see how much I will let them do. I think I answered my own question. This just showed that my soft heart got in my way, or cutting it short and to the point.