Gmail detect my domain link as a spam

any link i send from my website gmail flag it as a spam.
so how do i fix it?

buy a dedicated IP address for my host plan
and get help from10-12 gmail users to report my links as NOT A SPAM.

this will do?

Hi dude,
I suggest you to use postmaster.google.com, it will help to know your spam rate, domain reputation, ip reputation etc
You need to verify your domain in google postmaster by adding txt records in DNS.

Use the above steps to examine the issue.
Check you mail score before sending email broadcast in mail-tester website.

If you are having issue in IP reputation purchase another IP or follow IP warming steps.

Not an expert on this so I wanted to know more instead of throwing out a recommendation... Things have changed for the past few years...