Originally Posted by clickity click

Google likes websites it trusts. If a lot of high quality sites link to yours you will get an SEO boost.
If a lot of websites link to you which don't have high trust you will get more traffic but no SEO boost.

Therefore, how can I get my website trusted?

I am aware I can purchase high PR, aged links that Google trusts. I just don't want to spend $$$$ doing so.

I don't really want to spam other "relevant" websites asking for a link.

Any ideas?