Love is not attraction- attraction to the opposite sex is one thing that comes up as we begin to grow up, we first develop awareness and them being to get attracted to certain kinds of people.
Love is not jealousy - a lot of people have mistakenly come to accept that love breeds a feeling of jealousy, this is how many have made excuse of violence against a suppose person in the name of I am jealous of you. Love is not irrationally jealous in the name of passion. That is not passion, that is distrust, love is also not explosive anger or ownership, you don't love a person by force.
Love is not obsession- for young people who begin to find the company of the opposite sex interesting there is the tendency to get obsessed with another person, having the feeling of needing to be with each other every single moment to the detriment of other friendships, interests or life experiences.
One major confusion you will have as your oestrogen and testosterone develops is the LOVE vs LUST battle.