Thank god, at least you realize you have to be careful with people while talking on such a negative topic as suicide.
You see, people do not avoid you, it is they do not want to hear about suicide, as it is something which is not normal.
Have you tried to talk anything with people apart from suicidal tendencies? The main thing is you being aware of what you are going through, and you know that what you are suffering is not normal, so can you realize, how electrifying is talking about is so lightly to others...
Just talk about Gurbani, Wahiguru, Guru Sahiban...or any other positive topic, not necessarily religious, and you will see how people will want to be friends with you, and with the time passing, relations can become stronger, friendship wise.
The thing is, if you realize you are going through a negative phase, then do not pour it out so openly, rather each time absorb some positivity from those around you for any reason, by listening them or talking to others on any topic, except suicide, drugs, lust, violence, or any such thing which is harmful for the mind and soul.
If it is not possible for you, tell others to read you some verses from the Amrit Gurbani, or listen to His mahima through keertan, which is all positive energy, with which one can fill oneself, and brother believe me, it is all healing.
Medicines can cure physical maladies, but brother His mahima, His vadeeayee, cures the maladies of the mind, where resides all our blemishes. No one is perfect.
So as said somewhere, if you have choice, choose the best, and if you have no choice, do your best.
If ever you ever need a friend to talk, you may count with me. I will do my best to be helpful to you in any way I can, but promise me, to start with, now you will try to not talk about suicides, but of living at His Lotus Feet, with love and devotion.
Stay blessed.
Sat Sree Akal.