Idealisation of parental figure and internalising the primary care
giver is quite a normal phenomenon in development of any person. From what you are describing, it seems this has gone too far and is causing significant inter personal problems between you two.
The first thing to do, I suggest, is for you to talk to him about this. This would not only start getting the process of getting help but also will let you know his reaction to getting help. Any kind of help offered will obviously work with the hard work of the actual people involved and hence this is very important.
Inter-personal therapy appears to be a good form of talking therapy for you too but before anythign of this sort is sought out, please have a preliminary assessment by a mental health professional to see if there is any need for you both to seek help or is it that it may be you that may be overly sensitive. Sorry fro suggesting this but a competent professional has to look at all angles of a problem.