Infatuation has an element of sexual excitement. Love is the maturation of friendship. You must be friends before you can be lovers. Infatuation lacks confidence. Sometimes you check.
Love means trust.
You are calm, secure and unthreatened. Your beloved feels that also and that makes them even more trustworthy. Infatuation might lead you to do things you will regret later, but love never will. Love is an upper. It makes you look up.