How to get over one particular obsession?

I'm struggling really hard with relationship obsessions. Do I really love my partner? How can I know? Am I really just faking it? That kind of thing. It's making my life and relationship a lot harder than they need to be. I could use a few helpful coping mechanisms, trying to move away from less helpful ones like chasing reassurance.

Looking for inspiration

Hey, I’ve been trying to grow in my Catholic faith, but my ocd makes it very hard. I read a passage about a saint going through a great ordeal and start panicking that I need to give up everything and be martyred painfully. I seem to always hyperfocus on unhelpful book passages that make me afraid of God and see Him as a tyrant. I admire those who can read others words on faith, but I get suicidal, self harm, or turn away from God because I get sucked in so deep. That’s the obsessive part of ocd. Do you have any tips on how to get past this?