Totally not true.
Just because we're Christians doesnt mean we dont get suicidal or cant have depression.
Ive struggled with depression my whole life and have been in and out of hospitals due to suicide attempts for years.
To say that if we kills ourselves we must not be a Christian is just plain not true.
I agree that Christians can have depression. Then we pray for God's guidance. In some cases, God might want you on medication because there is something your body needs just as we need certain minerals and vitamins in our diets to stay physically healthy. If you love God, you want to obey Him. If you trust God to care for you in all circumstances, you tell Satan to leave and stop whispering thoughts of suicide. You tell your doctor that the medication is inadequate.
Have you killed yourself? The answer is, "No."
Mark 9:24
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
1 Peter 5
7 Casting all your care upon him; for he careth for you.
Isaiah 26
3 Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.
Luke 18 KJV
1 And he spake a parable unto them to this end, that
men ought always to pray, and not to faint;
Luke 18 NIV
1 Then Jesus told his disciples a parable to show them that
they should always pray and not give up.
James 5
16 Confess your faults one to another, and pray one for another, that ye may be healed.
The effectual fervent prayer of a righteous man availeth much.
17 Elias was a man subject to like passions as we are, and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months.
18 And he prayed again, and the heaven gave rain, and the earth brought forth her fruit.
Do you believe God answers prayer? Do you believe God cares?
I believe that. There were times I wanted Him to let me die. But His will for my life is more important than my will.
Isaiah 55
8 For my thoughts are not your thoughts, neither are your ways my ways, saith the Lord.
9 For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.
God's will is that you live! If it was not His will, you wouldn't be here. God bless you --- He loves you!