old flame
old boyfriend or girlfriend
A match made in Heaven
Two people are perfectly suited to each other
Love at first sight
Instant feeling of love
From the bottom of my heart
To really mean something
My heart skipped a beat
suddenly surprised
a soft spot in my heart
You really like someone
Home is where the heart is
The place you want to be
Have a change of heart
To change your mind
carry a torch
still in love with someone
Having a heart to heart
have a serious talk with someone
wear your heart on your sleeve
show emotion freely
A labor of love
a lot of hard work
love is blind
You don't see someone's faults
puppy love
first love when you are young
Key to my heart
you know what makes someone happy
head over heels in love
madly in love
tie the knot
get married
no love lost
you really don't like someone