Yoyo is right. Intuition usually is correct. I'm sorry about your situation. I understand about not wanting to seeme "paranoid." My husband used to accuse me of that too. But regardless of him having an affair or not, just giving you the ILYBNILWY indicates susceptibility. You need to read DB and start GALing (get out your own stilletos!).
There is no arriving, ever. It is all a continual becoming.