If I may offer a 20/20 hindsight view...

High school "loves" rarely survive as we move on in life. I still have sweet and wonderful memories of my high school love. But being in separate schools and meeting new people opened up our worlds so greatly that we called it quits.

My first spouse (who I met in college) was not of the same religion. I converted, but it was extremely difficult to figure out how to raise our children in that religion while remaining involved and enjoying celebrations with my family. We divorced after 18 years and the children are very mixed in what they believe in.

My first spouse also used. Stopped the pot and switched to alcohol.

Honestly, I think the most important things for you to consider are the facts that there has been a lack of trust for quite awhile and a lot of arguing. That does not bode well for a healthy and happy relationship.

I am remarried to someone who came from the same religious upbringing. We trust each other completely. And, in the 13 years we've been together now, I can count our arguments (actually just petty disagreements) on one hand.

IMHO, you will be happier in life if you break it off. There is a huge and wonderful world out there and so many people to meet.

I wish you the best.