Commenting!
Of course you are right in realizing others can't diagnose. And I know it's not the gist of your question, but there are a couple of things about which I hope to be able to offer some comfort. Regarding the first sentence of the quoted material -- at your age it's not unusual to feel that way. And it's not illogical. There is a sense of lack of independence because... to a certain degree there is a lack of independence(!) When you think about school -- there's generally not a ton of choice there as compared to college where one chooses a greater amount of what they study, there are parents, rules, restrictions in the work world, there isn't financial independence... etc etc. It sure seems that others, and probably it seems especially adults -- get to enjoy so much freedom to do as they want in comparison, you know? And that is true. (Although I'm sorry to report that it's less than it seems. There are still plenty of constraints, they're just some different ones. Oh well.) Anyway, it's ok.

The other is about the views seeming out of proportion to posts. There are many many reasons and they're nothing personal. Just a few... Time constraints (a biggie), having a hard time with words or thinking clearly, not feeling one has a helpful response/not knowing how to respond, wanting to think about it before responding and sometimes not getting a chance to get back to it, then feeling the response is no longer timely, seeing that others have already given a variety of good responses making one feel their post might be a bit redundant, or knowing they have only so much time to respond to threads, feeling the need to respond to another that hasn't received many responses or is perhaps missing an important point in the responses currently there, or knowing another one that they can better relate to or... or... or... And did I mention time constraints? Personally, I find it impossible to keep up with reading, let along responding -- and that's just in one forum(!) Also, among the quirks of my particular brain (and probably of some others too) is often having a hard time being at all concise, then editing over and over and over again. It's not unusual for this to go on for hours(!) (Why yes, I do have OCD ). Anyhow, it'd be impossible to respond to everything, and very very often not even possible to be able to respond to all the ones that we want to. Don't worry, it's not lack of caring though.

That said, I hope you get a nice number of helpful responses.