I'm seeing a trend in the replies here of the parent that might show an implicit bias towards a particular feeling of powerlessness in getting sex + companionship. If this is you, then know the following: in most cases, one is able to get an abundance of intimacy [1]. I know this because this was one of my life goals in my mid teens to early twenties. It was my first big achievement in life, for me anyway, I worked hard at it.
Don't believe me? Checkout Sean Stephenson (RIP). If you think he dated the women of his dreams because he's wealthy, my experience suggests it's his charisma. I've learned that a huge part of it can be trained. The funny thing is, no one would call me charismatic, yet, I found my voice and a way to expose my personality in an attractive enough way to the women I want.
I simply know the pain and if I can help other people not experience it, yea that would be an amazing use of my time.
The average woman judges me to be a 6 by looks at best. My target group of women almost never praise me for my physical features but my personality instead.
Judge for youerself: I'm tall, super skinny (most often the skinniest), have a very atypical face, so yea not in the top 1%. It took me 5 years to learn what I wanted to learn. And now I'm now I'm happy in that area of my life. For the past 8 years, I've had no issues related to lack of intimacy.
If you need any dating advice, I'm by far not the best dating coach, and I am by far not the best seducer. But I'm a HN'er so, and I struggled a shit ton with this and learned a lot of it consciously. Also, my peak moments have been borderline insanely awesome. So there's that.
Shoot me an email (see my profile) and I hope I can help a bit, any gender is welcome to email (I've seen some overlap in issues and approaches). In most cases, I've noticed, I can't help [2]. I wish I could share online resources, but it's a bit of a mine field since it really depends on how you learn and how you perceive the world.
Or just do what I did and simply Google "how to get a girlfriend/" and go on a wild adventure that will lead to your future love life. When learning this on your own, remember to be: respectful, full of empathy (both cognitive and affective empathy [3]), playful, confident and kind (preferably, in that order). I know, it's a lot, I never said this would be easy ;-)
[1] Intimacy being defined here as a mix of sex and companionship. Also, I say "most cases", since I know how terrible I was, but I also know that there are people even worse than me. In most cases, these people wouldn't be capable of applying any sort of logical thinking, so I suspect this isn't you.
Also abundance: the feeling of "yep, I'm good :)"
[2] I'm not a coach, just someone who wants to help. What I am struggling with when helping my friends is that: in general my friends didn't dare to experiment enough on their own. In some cases, this was even the case when I was able to give them exact counter evidence, tailored to every whim. So yea, if you at least aspire to want to be able to self-experiment, I might be able to help somewhat. I've done it :D
[3] Cognitive empathy: you're able to understand why someone goes through a certain situation by understanding it logically. Example: someone falls, therefore they must be hurt, therefore they will appreciate help.
Affective empathy: you're able to understand why someone goes through a certain situation by understanding it by feeling their pain. Example: someone falls (you feel it as well), by feeling their pain, you can feel that the person landed hard on his knee and by looking at their face and "feeling" their facial expressions, you feel their are in a huge distress. You now know that you need to calm them down and make sure their knee is cared for.
^ These two examples are quite simplictic.