You are not entitled to attention.
You are not entitled to a follow-back on Twitter simply because you follow someone. You are not entitled to blog subscribers or comments simply because you publish stuff. You are not entitled to clicks to your junk or signups for your newsletter or any thing of the sort.
In fact, you are not entitled to anything.
The web is not a democracy, nor is this an egalitarian society. Giving of attention when it’s such a precious commodity is not something to be done in some empty gesture of validation, and as the attention giver, I and only I will decide how I’ll approach my connections online. My reasons aren’t yours, nor should they be. You don’t decide the value in paying attention to you, I do. This black-white, good-bad, hard-and-fast-rules of engagement stuff is ridiculous at best, and pathetic at worst.
If you honestly need someone to follow you or friend you on a social network to find self worth or acceptance, it’s really time to re-evaluate your priorities.