Tired of being confused

Ok so I need some help. Firstly I want everyone to know that I am religious and in my religion Its not acceptable to date outside of our beliefs. I know a lot of you will disagree but just bear that in mind that my church and family are very adamant about this. So my problem is I fell in love with the most amazing guy and we dated for about a year and it was the best relationship I've ever been in and I know that it was true love. But we loved each other so fiercely that eventually we broke up. We didn't speak for about 5 months and in that time I've had another bf but I just broke up with him because I don't love him the way I loved my ex. And then one night I rang my ex's old number that I thought was disconnected and by some miracle he actually answered! So we chatted for a bit and he invited me around to his place and we watched movies and I spent the night and he looked at me in a way that I've never seen before. It was like he was happy that I was there but he had intense sadness in his eyes I wish I knew what to do. Oh and through the course of the night he found the tattoos I got (which also is a big no no for a religious girl ) and my tattoos are the hearts he painted for me when we were dating, he couldn't beleive I got it done and I told him I never wanted to forget him or his love. So it was an emotional night. And as I was leaving he said "your going to have to call me now" But it was amazing, so now I don't know what to do. Do I pursue him and try to get him back? Or was this just a one night stand fling? So I have two options, move on and stay true to my religion and keep my conscious, family, church and God happy. OR go after my ex and try and sort things out which could lead to serious heartbreak and a lot of tension with the rest of my life???? Please help

So you'd found 'heaven on earth' and through it have discovered that it contradicts the rulebook? What do you MEAN you loved each other so fiercely that instead of bringing you closer together it split you apart? Define all the ways in which you loved each other fiercely and same again for how this somehow backfired? And what on earth reason do you have for doubting that that magical reunion night wasn't genuine? I think everything you're saying basically boils down to this: 'Give me a guarantee that this relationship is worth the aggravation it'll inevitably attract'. Correct? Do answer all the above, though.

I am assuming he is a different religion and will not change. Date him again, you may get over him or find out he is worth it. Do not live with 'maybes".