A 20-year-old San Pedro resident who declared his intention to commit suicide on Facebook was identified Monday as the man who jumped to his death from the Vincent Thomas Bridge over the weekend.

Erik Bosques was seen climbing the San Pedro bridge, 35 stories above the water, on the south side near the Catalina Express terminal in the Port of Los Angeles around 5:20 p.m. Sunday. Motorists called 911, and the California Highway Patrol was en route when he plunged off the span.

“It was a pretty quick thing. It happened within a couple minutes,” said Phillip Sanfield, spokesman for the Port of Los Angeles. “He scaled a portion of the bridge. It’s not clear if he jumped or changed his mind and fell, but he obviously made an effort to get into that position. You can’t accidentally fall off the bridge.”

Los Angeles Fire Department divers pulled Bosques out of the main channel off Swinford Street, and he was pronounced dead.

He died of multiple blunt traumatic injuries, according to the Los Angeles County Coroner’s Department. The time between his injuries and death was “rapid,” officials said.

In a long Facebook post Friday, Bosques thanked “everyone I know or once knew” with two- or three-line personal messages.

Bosques, who listed his hometown as Owensboro, Ky., on Facebook, apologized for the last three years of his life.

“I’ve acted brash and bitterly in coping with a lot of family, relationship, mental and physical pain. I was not right to choose the path I did for it has led me to a dead end,” he wrote. “I am going to kill myself for good.

“This I will, will, try my hardest to do no matter how hard it is to follow through. Because like I said I’m at a dead end in my life. I can’t say how or when I will do it, but I have settled on it based on this inability to get through a hard place in my life right now.”

At the end of the post, Bosques said he knew he didn’t belong in this world.

“This here is my last attempt to stay away from bitterness and the ridiculous posts I put here on Facebook,” he wrote. “It’s not right and it’s pathetic and I just want people to know that I know that and am trying to be better. But I can’t do it anymore I just can’t live like this.”

Over the last several months, along with posts about lifting weights and video clips of himself playing the piano and guitar, Bosques had posted about his need for “serious healing” due to losing the past year over a “stupid (not really) girl who probably never liked me anyway.”

An acquaintance since high school recalls Bosques as someone who didn’t speak much to others in school.

“He was a very kind soul,” Erica LaFranco said. “You didn’t have to know him well to know he was a good person.”

Bosques was incredibly shy, but extremely talented on the piano, she said.

A couple of months ago, LaFranco looked Bosques up on Facebook. At the time, he didn’t have any Facebook friends.

“He posted about suicide and said that ‘no one would know,’ ” she said. “But I did. I went to his home to try and stop him but only his brother was there. He was aware of Erik’s problems.”

A few weeks ago, Bosques’ brother called the Los Angeles Police Department to say he was concerned his brother was suicidal. Police officers responded and spoke to Bosques, who was held for psychiatric observation at a hospital, Lt. John Pasquariello said.

LaFranco said Bosques lived with his grandmother and brother most of his life; his parents had been out of the picture since he was an infant.

LaFranco said she reached out to him on Facebook after his post Friday, begging him not to do anything.

“I had always hoped he would overcome his issues,” she said. “It hurts so bad to even imagine this is real.”

Jill Harkavy-Friedman, vice president of research at the American Foundation for Suicide Prevention, said a person in a suicidal state is desperate and trying to end their pain.

“We know that when people are talking about it, they’re in great distress,” she said. “Any kind of reaching out would be helpful.”

A few friends did respond on Facebook to Bosques’ post.

“What’s difficult about Facebook is you may not know where the person is at the time they’re posting,” Harkavy-Friedman said. “One can do their best to try and reach out to someone. … Time is critical.”

Facebook allows anyone who sees a suicidal post to copy the URL or take a screen shot of the post and send it directly to Facebook, she said.

“They will work to assist the person in any way that they can,” she said. “They take guidance from the National Suicide Prevention Lifeline.”

The Vincent Thomas Bridge has been the site of numerous suicides over the years. An unidentified man jumped from the bridge in January, and a 47-year-old Long Beach man fell to his death in May 2013. Hollywood film director Tony Scott leaped to his death from the bridge’s apex in August 2012 for reasons that have never been clear.

If you or someone you know is considering suicide, call the National Suicide Prevention Lifeline at 800-273-8255. The lifeline is free and open 24 hours.