1.You don't mind making sacrifices for them.
If something happens, you are there to stand in the gap.
2. You accept them for who they are.
3. You are willing to be with them through the ups and Downs.
4. 1 day with feels like forever.
5. You would rather spend time with them more than anything else in the world.
Make sure that if you are led by God first to make it official if you believe that you are in love with someone.