I am so sorry for your pain...it's a huge enough tragedy to lose a beloved son no matter how it occurs. Men are more likely to be successful and I think that's partly because we aren't given any warnings. I don't think his suicide was meant to hurt you but to stop hurting himself.
At a very low point in life myself the only thing that stopped me was thinking that the person who found me would undoubtedly be my mother and she didn't deserve that from me. I knew if anything happened to her, it would just go spiraling through the family. Even so, it was still really, really hard to keep on living when I was in so much emotional pain I didn't want to.
I've been in chronic daily pain for 25 years now but I can't put my son at higher risk by killing myself. As a teenager he was on the verge of suicide himself when he thought his life was over before it had really begun. I don't know if another family member has committed suicide, but if a parent suicides, it makes the chances a child will kill themself 50-50.
Here's something very important...committing suicide isn't going to keep your son from going straight to God and being there to see you. A vengeful suicide--the type where the person tries to frame someone else for their death or tries to make sure they will be miserable for the rest of their life....that's someone who has chosen to turn away from God.
If someone is mentally ill, or in extreme physical and/or emotional pain that won't keep them from being able to be with God. That's because their soul becomes free and well once their soul is free of the conditions that made them commit or even think of suicide disappear once they have left their body. I truly believe this with all my heart.
When you think of yur son with love, he knows it. I was afraid of death for a long time until my paternal Grandpa basically told me goodbye. I didn't hear it, but I felt it...it was like getting wrapped all over in love that just felt like Grandpa. I got the call 10 minutes later telling me he'd died 150 miles away about the same time I got that hug. I haven't been afraid of death since then. He's not the only relative or friend I've heard from...like having an anniversary card from a friend fall out of a cookbook 3 days before our anniversary. I'd been missing her and there the card was--and I don't keep cards in with my cookbooks.
It may take longer to know that he's around because of the pain he was in before crossing over. Look for moved coins, favorite songs, even phone calls where no ones there. Who we are and who we love survives. My maternal Grandma died 2 years ago--she was over 100 years old and had still been living in her own home when she turned 100. A few days before she died she started worrying that maybe she was still here because she wasn't good enough for Heaven. (If she couldn't get in, a lot of us would be in trouble!) About 2 nights later, she dreamed that she was at a huge party with all the friends and family she hadn't seen in so long. After a while, she realized that the room was enormous and that she'd never seen any colors that were so magnificent. She was less than thrilled waking back up inside her 100+ year old body. She died that same week. One of the nurses came in early the day she died to say goodbye and warn us that she was already dying and would be gone that day. I don't see her...there's some psychic ability in my father's family, but I can feel her. Her dream made me realize how few ties she had holding her with us compared to all the people she had waiting for her.
Your son is in Heaven. Don't let anyone be cruel or petty enough to try to tell you anything else because it isn't true. You'll be in my prayers.