What Could This Be?, I am really not insane. I promise you! Options

Before I get to my question, I'll give some background information on this:

When I was about 11 or 12, I dabbled briefly in Ceremonial Magic(k). I know very well now that I had no business doing anything of that sort then!

Anyway, while playing with it, I can into contact with...something. It is a male, as far as I can tell and he's been a part of my life for nearly thirteen years now. I could call him a spirit since I have no clue what he really is.

What has happened during my time "with" his is as follows:

--I have had dreams of either being abused or having intercourse with him, and have woken up with either bruises, cuts or damage elsewhere (I'm rather shy about talking about that part since the last person I told about the last encounter suggested that my own husband raped me).

--He has been seen by other people with no prior knowledge of who/what he is or about our connection. If I met someone new, he has a habit of following them home...trust me, that makes for some strange conversations later on!

--Our relationship seems to be parasitic (and has observed to be so by a friend), however, I'm almost addicted to his feeding off of me.

--He isn't around all of the time. There is possibly one month out of a year where he seems strongest, and, then, he's gone or faintly there for the rest of the year.
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I'm not familiar with spirits outside of the general ones, so I'm having a hard time with even believing that he does exist (even though other people have seen him).

I don't know what this is. Does anyone here know, or have a clue?
Could something like this even happen? I kinda just need to know that I'm not losing my mind, which it probably sounds like I have already.

Sorry for the vague post. I've made it a habit to keep my words guarded just in case. I can elaborate if anyone has questions.

If you did not invite it, than tell whatever it is to leave. While you may feel that it has "helped you," these types of relationships are rarely good. Sometimes a magickian might invite a spirit to feed off of him or her in exchange for protection or other services, the key word here is invite. The spirit, or energy form, knows that at any time the magickian may sever that connection and therefore understands not to take advantage of the said magickian. This is not the case in your situation. Whatever it is simply chose to latch on to you and is now influencing your thought pattern. Sever the link and banish the entity straight into the depths of the abyss. It may seem like it is helping you, but if it violated your space and latched onto you without your consent, than it must now leave because it does not respect you, your authority, or your right to live in privacy.

-Ashnook