I think you are spinning because you are indecisive. Make a decision and stick with it. For example, decide to block her if you are weak, and then you won't face these fluctuations (if she doesn't talk with you then you'are OK. If she does, then your mind goes in many directions). Or decide that she is a friend, and then anything she does means nothing to you but entertainment and fun times, even though what she sent sounds inappropriate to be sent to someone who is in his 60s, to be honest.