I understand how confusing the two is easy especially since lust is usually the gateway means to love.
It is actually a mathmatical formula.
A=Attracted by Physical Appearance
B=Attracted by Personal Communications
After A combines with B it ends up creating C which is Like.
The more you obtain the growth in variable A or B then more likely C grows too.
It is when that growth stops that C is defined as "liked enough" or "Love".