I hesitate to say that you don't need friends, because I don't exactly think that's true--but I do think it's close. We have a biological inclination to share our lives with others. But I do think you can find fulfillment through yourself, and that friends can appear through that as well.
I wonder as well what it's like to be truly loved, to have ride or die friends, or hell even just someone who sticks their neck out for you and knows you like you know yourself. But also, philosophically, how does having or not having that justify your life or death? Only you can do that. The 'value' of a human... it is simply indeterminate, to me at least. Some of the greatest people in history have acted alone. Besides, if a human did have measurable value, would it not come from the unseen, internal content of one's character? Not the superficial, incomplete judgments of other humans?
I know this is easy to say, but I really do think if loneliness is your problem, there is hope (if you want there to be). All it takes is one person, one interaction to find someone. Sometimes not having friends isn't a matter of you being a terrible person or something, it's just bad luck. and it's too hard to determine which is which from our own vantage point sometimes.
Shouldn't your boyfriend count as a close friend? He chose to be closer to you than anyone else...
I kind of agree with you but I also see where OP is coming from. One person cannot necessarily fulfill all the emotional needs we have in life. That's why we have parents, siblings, aunts, uncles, cousins, friends, coworkers, confidants, acquaintances, and so much more. That being said, you're right in that even if OP's boyfriend isn't enough, he still counts.
I guess when you're in a dark place, it's easy to be hyperbolic and cut out the people who are there.