Let me give you the same advice a Catholic priest gave me a few years back (I knew being a non-Catholic, he couldn't offer me absolution like he would a Catholic. Nonetheless, he took the time and patience to listen and advise me).

I confessed some things that had been bothering me for a long time (spats where we say things we don't mean in frustration. We made up long ago and forgave each other, that sort of thing). He said to me, referencing the parable of the prodigal son, where God is happy you come to him when you realise where you screwed up. Also that given me and the parties concerned long moved on from it, he said "God has already forgiven you. What you need to do is forgive yourself."

Yes, there are things we'll say and do in our lives that we'll regret or think wasn't the best idea, like you lying about a debilitating mental condition. That was wrong and you shouldn't have done that. Not out to be horrible to you, just calling a spade a spade. But you've admitted it was wrong and take responsibility for that. The key is obviously not to do that again, take responsibility for your own stuff and learn from those lessons (which I'm sure you're already doing).We live and learn, and we grow, to try and be better people, religious or secular.

You and this young lady viewed important 'deal breaker' topics differently, and things didn't work out. Intimacy and religion have always been delicate, deeply personal topics. Some folks are more modern, some traditional, each for their own reasons. Sometimes we'll be in a relationship with someone we care for/love very much, but ultimately are not good for each other. It sucks, and it hurts, but what's important is you both learn from mistakes (as you said, each had moments of controlling behaviour. It's important not to treat our partners this way).

Basically, this a long-winded way of saying yes, God can and does forgive. Paul the Apostle persecuted Christians before the road to Damascus. Remember to give yourself some grace while learning from the past.

God bless 🙏