If he's truely got bipolar disorder it could be possible. Something like 30% of people with bipolar disorder end up dying by suicide. Both me and my father have been diagnosed with it. There's only been one time in my life when I ever considered suicide.

If his life is so bad he has to take antidepressants to keep from killing himself he should just do it anyway. They don't prescribe antidepressants for bipolar disorder(because bipolar disorder causes you to go back and forth from extreme depression to extreme mania and antidepressants would probably fuck that up.) As far as I know, lithium is the only the prescribed for it.

Anyway, like most "online suicides", this one is probably fake.