Contrary to popular belief, self harm is not directly related to suicide. For me it never was. It was like an addiction at times. It's very complicated and hard to explain, but it made me feel better---and worse. It was a way to release anxiety and a way to punish myself for failing socially. So it can be connected to Social anxiety. It doesn't mean you want to kill yourself.
BUT IT WAS A TERRIBLE DECISION to start. I want to be very clear on that, it was probably the worst most destructive 6 months of my life after I cut for the first time.
I think maybe this was just an impulsive thing for you, recluse. You can make it a one time incident and move on.
Like Vulpix suggested, there are plenty of ways to get rid of what you're feeling--you don't have to cut it out. And the best remedies I have found--and I do not cut anymore and haven't for a little more than a year and now have no desire to do so again--- are physical. Find another repetitive physical activity like running, punching, smashing rocks, pounding nails, whatever it takes.
And that's my 2 cents. Best of luck to anyone struggling right now.