Yep, those red flags are flapping in the wind. Because of this man's seriously quick attachment and major obsessive behavior, it's important to let that be your last contact with him. Do not reply to further text messages from him or it will give him false hope and he'll continue to pester you. Refer to my posts from the book "The Gift of Fear" by Gavin DeBecker, if you need to. They detail how quickly this can get out of hand unless all contact is stopped.