I feel loved, cherished, and secure in my relationship.

Security is the hardest of those to notice, because it registers as an absence. No calculating what mood you are walking into. No rehearsing a sentence before saying it. No background process running quietly all day.

People who have lived without it recognise it instantly and often can't name what is different, only that they are less tired than they used to be.

If you have it, the sign is that nothing in particular comes to mind. That is not a shortage of feeling. That is what the feeling is like from inside.