Love Junkie 

There are those who may be addicted to that love "high." They need that amphetamine-like rush of dopamine, norepinephrine and phenylethylamine. Because the body builds up a tolerance to these chemicals, it begins to take more and more to give love junkies that high. They go through relationship after relationship to get their fix.
(via How Stuff Works)

Jennifer is a love junkie. After she broke up with Sean, she got with Gage as soon as possible.

Love Junkie by SV5Y August 6, 2014

Love Junkie 

Someone who NEEDS to be in a relationship as much as an addict NEEDS their crack, heroin, or whatever else. As soon as one relationship starts do go downhill or ends, the love junkie will quickly have someone else lined up so they're not single for longer than a few weeks. They have little to no identity outside whoever they're with, and as quickly as they attached to you, they detach and find their next fix.

My ex was such a love junkie, we got together 2 weeks after she broke up with Tina, and when we started having problems she started romancing her online friend in NC who she left me for at the end.

Love Junkie by CITYGIRLCARM January 5, 2009

junkie love 

It is when two drug addicts (junkies) are in love with each other.

Sharon is comforting Bob who is smacking out at the train station, awwwww junkie love.

junkie love by Daphuk January 6, 2016

Junkie For Love 

One who is so in love with a particular person or thing in the same way that a drug addict is in love with his/her hard drugs.

It was used by daveedope, a Nigerian Hip Hop artiste who raps and sings in his debut track. It's even the title of the track.

When it comes to Lily, nigga forget it I'm a junkie for love.

Junkie For Love by daveedope March 11, 2018