Hi... There is no issue with either of you. It takes more than just love to build a relationship and to sustain a marriage. One part of it to understand each other's idiosyncrasies and to learn to adapt to them. The possibility of him cheating on you is not zero but again he might be just talking to this girl and not told you because he didn't wanted an argument. You need to understand first is it your insecurities making you doubt him or your instincts. If it's your insecurities than work need to be done on you to address them. If it's your instincts telling you that something is not right than you need to trust your instincts and try to find more information about their relationship.
Next Steps
Consult a Psychologist.
Interpersonal Relationship Counselling is required.
Health Tips
Mr. Gunjan Maithil
Senior Psychologist
Cell: nine six seven one three zero three one three four
Website: https://gunjanmaithil.wixsite.com/therapy
App: http://wix.to/fECHB08?ref=cl