Love and marriage

Well I found out My Husben has been messaging this woman for two weeks and his reason was that she was telling him all the right words to fell special and wanted then he say’s that all he did was just message her now I feel so anger and so confused I feel like he betrayed our marriage by not communicating that something was wrong instead he looked for the easy way out and now I don’t know what to do he has asked me for forgiveness but I don’t know