Photo: Christopher Polk/WireImage

Bobbi Kristina Brown, Nick Gordon

Nick Gordonfrequently spoke about his late ex-girlfriendBobbi Kristina Brownbefore hediedfollowing a drug overdose on Wednesday.

“He literally talked about her every single day. He still loved her so much,” Gordon’s brother, Jack Walker Jr, tells PEOPLE exclusively. “He would say to me, ‘Man, I wanted to marry that girl, I miss her so much.’ ”

Whitney Houston’s daughter was found unconscious and unresponsive with drugs in her system in the bathtub of the Georgia townhouse she shared with Gordon in early 2015. She was 22.

Bobbi Kristina Brown and Nick Gordon.Imeh Akpanudosen/WireImage

Bobbi Kristina Brown, Nick Gordon

Walker Jr. tells PEOPLE that in recent weeks, Gordon had been “having issues” with his current girlfriend Laura Leal.

“A few weeks ago he and Laura started having issues. It got pretty bad so Nick moved into a hotel,” Walker Jr. says, adding that in the week before his death, Gordon “got distant.”

On the morning of his brother’s death, Walker Jr. says he first learned that something was wrong from their father.

“Our father called me early and said, ‘Son, get to the hospital. Nick is in ICU and it does not look good.’ ” Walker Jr. says. “From what our dad told me, the police found him in the hotel room at 6 a.m.. Apparently he had been dead for 15 minutes. The paramedics got his heart beating again, and at the hospital, it kept stopping so they had to keep bringing him back.”

“When I arrived at the hospital they had him attached to so many tubes, they were literally bringing him back to life again and again,” he continues, noting that “it was too late.”

Bobbi Kristina Brown and Nick Gordon.

Bobbi Kristina Brown, Nick Gordon

Walker Jr. previously confirmed to PEOPLE that Gordon died of a drug overdose Wednesday in Florida. PEOPLE has learned the drug in question was heroin.

Gordon’s lawyer Joe S. Habachy also told PEOPLE, “My heart is heavy today after learning that my long time client Nick Gordon died at the young age of 30.”

“While I cannot speak to the specific circumstances of his death, I can say that it’s been truly heartbreaking to have witnessed first hand the total devastation that drug addiction has wreaked upon a group of young friends, all of whom were loved and had immense potential,” Habachy added.

Sources toldThe Daily Mailthat Gordon had suffered a number of heart attacks on New Year’s Day and was rushed to the intensive care unit at Altamonte Springs Hospital, where he eventually died.

Tiffany Rose/WireImage

Nick Gordon

In recent years, Gordon found himself entangled in legal drama after Leal accused him of a physical altercation.

Due to those statements contradicting her original ones, prosecutors decided not to go through with a trial following the review of body camera footage, the 911 audio, sworn statements and jail call recordings, and announced that Gordonwould not be charged.

Gordon was previously arrested in June 2017 on domestic battery and false imprisonment charges after Leal filed a police report alleging her boyfriend had beaten her and held her in her home. The charges were dropped in August of that year.

If you or someone you know is struggling with addiction, please contact theSAMHSA substance abuse helplineat 1-800-662-HELP.

source: people.com