“Matthew had the kindest heart and the best personality. He was nothing like any of the characters he played on television,” actress Christine Birchfield, his close friend, tells PEOPLE exclusively. “He was so much more kind, relatable, and his humor was beyond comprehension. He was truly one of a kind.”

Perry — who wasoutspoken about his addiction strugglesin hopes of helping others — was eager to share his talent to help his friend as she pursued her own career.

“He helped me learn more about the industry and how to be a screenwriter. Matthew helped me with questions during my film school journey and supported my passions,” says Birchfield. “He was compassionate, giving and seemed to always try to put others before himself.”

Gregg DeGuire/FilmMagic

Matthew Perry attends the 2022 GQ Men Of The Year Party Hosted By Global Editorial Director Will Welch at The West Hollywood EDITION on November 17, 2022 in West Hollywood, California

As hisfamily, friends and fans worldwide mourn the star, Birchfield emphasizes how important it is to honor Perry for the work he did off screen.

“He is a great loss for the world and I hope people remember him for more than being an actor, but for the heart he held,” she says.

A source previously told PEOPLE Perry — whodetailed his addiction journeyin his memoirFriends, Lovers, and the Big Terrible Thingand was a passionate advocate for treatment over incarceration for drug offenders — was in the process ofestablishing a foundationto support those suffering from substance abuse beforehis untimely death on Saturday.

During his interview with PEOPLE for a September 2022 cover story, Perry reflected onhis “resilience” through his yearsof fighting his demons.

“I’m a little hard on myself. I give myself credit for being sober today, for caring about others, for never giving up,” he said at the time. “Helping people as much as I do. That’s probablymy favorite thing about myself. Being. creative, seeing, learning that if you’re uncomfortable or feeling anxiety, one of the ways to get out of that situation is to be creative.”

Matthew Perry photographed in Hollywood, CA on September 20, 2022

Last fall, Perry shared how he hoped to be remembered whilespeaking on theQ with Tom Powerpodcast.

“When I die, I don’t wantFriendsto be the first thing that’s mentioned,” he said. “I want [helping others] to be the first. And I’m gonna live the rest of my life proving that.”

If you or someone you know is struggling with substance abuse, please contact the SAMHSA helpline at 1-800-662-HELP.

source: people.com