Your signature "When a man ends his life, it is the people who knew him that are to blame for not giving him the support he needed, like if he needed a girlfriend and nobody even tried to help him get one." is an intereting one brother, and probably somewhat true.
The reason behind depression and suicidal thoughts is a lack of support, when that support of your own will ends.
There is a greater one than any man here who can provide you with support. That would the Lord, Jesus Christ. He can provide you with support beyond measure, and give you a hope and a future.
Christ came to die for the crushed in spirit and the broken hearted. He has promised to give you a hope and a future. Just remember that Christ understands your pain better than you yourself do, and He upholds you silently, waiting for you to grab on.
Luke 4:18
"The Spirit of the Lord is on me, because he has anointed me to proclaim good news to the poor. He has sent me to proclaim freedom for the prisoners and recovery of sight for the blind, to set the oppressed free,
Isaiah 61:1
The Spirit of the Sovereign LORD is on me, because the LORD has anointed me to proclaim good news to the poor. He has sent me to bind up the brokenhearted, to proclaim freedom for the captives and release from darkness for the prisoners,
Psalm 147:3
He heals the brokenhearted and binds up their wounds.
Psalm 34:18
The LORD is close to the brokenhearted and saves those who are crushed in spirit
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Remember always that Christ was anointed to set you free from darkness, the prison of your own mind and sins. He has been anointed to bind up the wounds of your sorrows and broken heart.
Christ felt all agony and pains, unimaginable suffering beyond our comprehension, and can directly relate to your suffering. Christ's suffering perfected His mercy.
You are Love, and you have an endless aquifer of support and hope, boiling out of Christ's heart, overflowing and spilling into your cup, which will overflow with love and support.
In all ways, turn to Christ, who upholds those in times of sorrow.