Requesting relationship help?

[Angrist]

My ex was somebody I had mailed with for 2 years when we met up in real life. We both fell in love immediately, it was a great combo on first sight. Some examples: both vegetarian, we both liked LotR and Star Wars, fan of the same artists, both a bit crazy...

We were good together, we had a great time. I asked her to marry me and we became engaged. But now I see that she loved me as long as she had fun. When something came up that she hated so much, she decided to break up. Her love wasn't deep enough. I can't live with such a love, I'd always be scared she'd leave me.