Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.

I am alone now too.
My message is getting into a support group. There's something called NAMI which could be in your area. In a real pinch, this may sound odd, but I'd go sit in on an open AA meeting. Have you ever consumed alcohol and it didn't work for you?
we are here!
and, so sorry about your friend.
This is something everybody can relate to.
And, even if this question has been asked, it's never been asked by you. That's part of what this group is about.
The other part...well it's been done and we'll. To offer up a few suggestions to help you.
It is always hard to lose a friend...for whatever reason.
But, life goes on. And so do you. (Yes, I can be a little harsh. Truthful but harsh) Get involved in something. Find a group of people with similar likes and join them. You never know...a new friend might be waiting there. And don't expect the first group to contain a friend. Sometimes this takes time.
Remember, Moses (in the bible) spent forty years thinking he was somebody; forty years learning he was nobody; and forty years discovering what God can do with a nobody.
(Dwight L. Moody)
Lets connect! I'll be a long distance friend.
I am not saying you do any of the following. I don't know you and I don't assume anything about you.
First of all, Bipolar is vastly misunderstood. Especially unmanaged Bipolar. Same goes for MDD.
Second of all, we need to know what to expect from a 'friendship. I have been a 'community leader' in this group for over 10 years. I frequently see people with 'serious' depression asking 'why doesn't my family understand', and "why do my friends tell me to just snap out of it".
The following is just my opinion: A 'friend' can't be someone who is weighted down by the problems of another friend. It gets tiresome, is frustrating, and discerning. Family cannot 'cure' depression, Bipolar, Cancer, or any other such thing. Nothing wrong with informing friends/family of 'problems'. Just be sure you are not giving them the ownership of the problems.
With health issues, best to make your Doctor your friend. He/she is trained and expects to take a lot of responsibility for your health problems.
Again, when I say 'you', I mean it conversationally.
This is not rocket science. Friendships and good relationships thrive on good times and harmony. Life is hard and it's OK to share but burdening a friendship can kill it.
Back now to you personally. Make sure your Bipolar and Major Depressive Disorder are effectively treated. Project a friendly, trustworthy, (blah blah) image. Nourish friendships rather than compromise them with doldrum.
Everything I have said is only my opinion. You are free to agree, partially agree, or reject any of it.
I too, am sorry for your loss. I hope you can complete your grief soon and have a more comfortable life.