Adult ADD or something else?

I don't have a lot of money so I'm trying to self diagnose without much help - and yes I understand this is not a wise thing to do. I have been to the local free clinic and they really don't have much time to talk to me.

I am never fully happy or settled. I am happy sometimes, when things are changing, when something new catches my attention momentarily, when life requires me to be self sufficient and improve my survivor skills. I am 32 - I am constantly moving. I have never (in 12 years) been able to carry out a full year's lease on a house or apartment. I always want to be somewhere new - seeing new things, being new places, meeting new people. I have finally given up and bought a travel trailer which has become my new home so I can move at will.

I can't settle in relationships - so much so that I became polyamorous and never limit myself to only one partner. Even when I am happy with one partner, I am always on the lookout for another.

I can't concentrate on jobs or school. They become boring after a very short time and just as with relationships - I am always looking for something else. When I was in school, I changed my major so many times I never could finish even though I had enough credits. I did get good grades though.

Individual tasks are generally ok although I am a master procrastinator and have a hard time focusing on anything that doesn't absolutely need to be done or doesn't interest me fully. When I'm interested though, I am really into something and can generally finish a novel in a couple hours. As for more complicated projects, I get really excited at first and generally lose interest. Not much gets finished.

I am not self destructive or impulsive, necessarily. I do not engage in self destructive behaviors. I drink in moderation, do not have massive credit card debt, and always check the papers of people I get sexually involved with. The only thing self destructive I engage in is eating food I know I'm not supposed to. Still, I am not overweight and don't have any major health concerns besides maybe pre-diabetes because of my indiscretions and lack of self control in that area.

So, if you've read all that, is it ADD? Is it depression? (If so, I have had it all of my adult life and medicine does nothing.) Is it just my personality and I should get over it and go with it and try to hurt as few persons in the process? I might ascribe to the latter if I didn't have a son that is counting on me to provide some sort of security, stability or be somewhat of a role model for permanence and good relationships. It is starting to get to me though. I have managed to skate by for the most part with my travels and survive but I feel my restlessness is finally coming to a head and I can't keep going on like this without causing some kind of damage. I am broke and tired, tired of searching for something I might never find.

I am 31 and have a similar issue, I call it my wanderlust addiction. I have been married and divorced, and was pretty permiscuous during the last few years of the marriage. I have been in my present relationship for 2 years, good right?, yeah except it isn't. I am always trying to foster flirtacious interactions with other women, and it isn't fair or right to do this to my mate, I lose sexual chemistry pretty fast, or at least it seems like it as I have only been with two women long enough for that to have happened. I haven't "cheated" physically this time, but I am beginning to question the relationship, and wondering if the problem might not be "is the grass greener", the problem might be "why am I so afraid of walking away from a boring relationship"? I think it's the security that comes with a long term relationship, makes it hard to leave. I know that sounds bad, but isn't there a middle ground out there?
It's hard not to think about collateral damage that I may be causing. Am I wasting her time if I'm just going to up and leave?
Oh Oh and I get you on the procrastination bit as well, Procrastinating is the only thing I ever follow through on. I went to college off and on for a decade and never finished, despite my huge accumulation on non-related credits.
It's hard to think that these two issues aren't related. The worst part for me is knowing that no anwser, no matter how much I want to hear it, will be the right anwser. Maybe love just hasn't come for us, maybe we're just broken. Sorry, that was no help, just know you aren't alone.