How do I know she truly loved me?

I dated a religious girl for a few years while I myself was athiest. For the first 8 months or so the religious stuff never came up. But she started asking about it. She pressured me into trying her church because she kept saying we couldn't be together if I didn't convert. I didn't like it, and I gave it several tries and she tried to convince me to have missionaries talk to me.
She eventually said that she would try to make our relationship work. But she decided to break up with me months later.
Within 3 months she started dating someone else and is currently engaged.
I'm heartbroken. It feels like she never loved me. That she only wanted to convert me.
She did love me
Vote A
Only wanted me to convert
Vote B
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How do I know she truly loved me?
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