I usually lurk for the most part on message boards but, while reading many of the comments in this, I saw misconceptions that I want no part of as an INTJ. A great deal of those things are nowhere near my way of treating romantic relationships and that includes the replies of other INTJs.
Just for the sake of stopping mistype claims before they get started, I have taken multiple tests in relation to this. Both online and in more than one college class. It's always the same. Mainly, I'm showing just how misleading stereotypes really do get.
While it's not of the relationship topic, I would like to say that every time I see people use Spock as an INTJ example it makes me want to shake them until they get whiplash. That show has always annoyed me.
On the actual topic...
If I was in a relationship with someone and they told me one of their primary reasons for being with me was that I'm "dependable," I would probably end that relationship soon after for both our sake.
I'd also like to point out a couple things before what I'll be saying next. My last two relationships came to basically "devastating" ends. After the first I hadn't tried for another for at least 3 years and I haven't attempted a third time yet, so its been almost 4 years and counting after the second one. Much of that time has been due to my own choice. I don't know why girls are attracted to guys even slightly so I can't judge my own appearance very well but from what I hear I'm well above average, so it's nothing like that. Yet, still, when it comes to relationships...
Romance and the day to day don't even co-exist in the same world for me. I certainly have my base tendencies but, I know what they are very well. In the general population, I'm rather stubborn in how I act. I do as I see fit and no matter the outcome, I will rarely, if ever, apologize for doing so. I can even be as cold as it gets. If someone has gotten on my bad side, which is actually very hard to do, the way I treat those people is summed up best by two things I've said on different occasions, more than once. "I'd never kill someone i don't like, the living suffer far more than the dead" and "the only thing I want from you is a shout out on your suicide note." It's not the type of thing where you say it in the heat of the moment and regret later to me, either. It's my true disposition concerning the topic.
In a romantic relationship, it's quite a bit different. I will go out of my way predict my own behavior in most situations for damage control. However, the way I do that was born from trial and error. If it happens once, there's little chance it will happen a second time if it's pointed out. It gets added to my list of things I try to stop before they start. If I don't get that second chance I actually take it rather horribly. However, that reaction never gets verbally expressed to anyone. In fact, if my memory hasn't failed me, this would be the first time I can recall ever mentioning it.
When I'm in a romantic relationship, I purposely shoot for the irrational, impossible "fairy tale." I know that, that goal is unrealistic, yet every action I take is in the spirit of fulfilling that goal with how I treat my partner.
The way I see it is, love, itself, is nowhere near rational in the first place. Trying to combine rationality and romance is a futile act. If I'm going to pursue such an irrational thing that I have no true need for, I'm going to do it all the way.
I admit, though, offline, I can be something of a misunderstood social retard and communication concerning feelings takes time. Even if I'm fully willing to disclose everything, it's difficult. I get hung up on how I want to word it. I'm already somewhat weary of what the reaction will be even if I word it perfectly. I think I end up accidentally fooling myself into thinking the perfect way to say it exist and once I find it, it will be easy when in reality, I'm just going around in circles because the wording isn't my actual problem at all.
People often react sincerely shocked that such things would ever come out of my mouth, if they ever hear it at all. (I have to have extreme interest in the person to even reference such things when speaking with them)
It's funny in a way, because it's actually inspired by the most common traits INTJs share. Confidence and a strong will. I know very well that that the odds in favor of success barely exist but, I figure that if someone, anyone, at any point can pull it off, I see no reason why it can't be me. That includes pretty much everything, though. I also see common events in sort of the same way. If someone expresses amazement at someone doing just about anything, I will usually shrug while thinking "so? that just means you or I can do it too."