The enemy will say whatever it takes to bring division in your marriage.
I encourage you to pray for a marriage mentor. Someone who is a strong Christian and who will be honest and loving with you. This can be a difficult thing to seek out. This is why I strongly recommend asking God to direct your decisions and discernment for the right mentor.
By having a mentor, the devil’s lies will not be effective. That mentor will be able to speak truth in the darkness. They will also provide accountability, wisdom, and encouragement. You don’t have to feel alone, God has people waiting to stand beside you. Ask him today to reveal that person.