Hello Friend, Good that you are seeking a help. Relationship management is subjective and no common solution for every scenario. It depends based on individual, culture and their maturity levels. However openness and trust is very key to continue any long-term relationship.
Suggest you to have counseling support to explore the pro and cons before you decide whether to tell him or to hide it.
Next Steps
Take marriage counseling online which should be ideal for your kind of suitation. . Feel free to reach out to me online through Practo for further detailed evaluation and suitable solutions that you can follow.