The value of a thing is a relative concept. What it is worth to you may be more or less than the next person down the line. Further, since we are different as individuals in our abilities and limitations, the cost may be much higher for us as aspies than it would be for NTs. Further, given that you don't know what having a GF is like until you actually have one, part of the appeal is simply curiosity of what is this really like. Unfortunately, the only way to know is to try, and if the value sharply declines when the novelty wears off, you end up in a very difficult situation.
Personally, I have sufficient reason to believe a close emotional relationship would benefit me enough in the long term that it is worth the effort. My problem has always been that the initial cost in terms of searching and finding someone appropriate is extremely high in terms of time, money, and energy, three things of which I was not blessed with an overabundance. As a result, my search has been limited to times in my life when I had enough spare time, money, and energy to spend on a lot of activities which I otherwise wouldn't engage in (meeting new people, dating sites, lots of money for restaurants/movies/etc., activities). Many of these activities would actually be things I would do if I was in a relationship, because the value of these things increases substantially when I have someone to share the experience with, but until I reach that relationship stage, the cost is very high and the enjoyment value very low.
Ultimately, it's up to you to decide what it's worth to you personally. If you don't think being in a very close relationship with someone you're around all the time is something which will be good for you, you might consider if what you're really wanting is simply a sexual relationship, and while society may frown upon it, there are people that are looking for casual sexual relationships or even just hookups. For that matter, you can pay for sex. People have done this since the dawn of civilization and will continue to do so until our species is extinct.
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Self-Diagnosed Dec. 2010
135 Aspie, 65 NT--Aspie Quiz
AQ 40
BAPD--124 aloof, 88 rigid, 83 pragmatic
EQ/SQ--21/78--Extreme systematizing