You say you have a feeling. What does this feeling come from? Has his behavior changed in some way. Is there some piece of evidence that makes you feel this, phone calls, receipts?

Is he gone for periods of time and you do not know where he is and makes up an excuse?

We all have feeling of neglect some are well founded and some are our own insecurities. I would say look long and hard at what is making you feel this way.