Remember that you cannot undo the suffering he has brought upon you. Even killing him will not bring you peace, anon.
Now for security, remember that the safest computer in the world, is the one that is offline.
Encrypt everything important.
Never use your real name.
Make sure that all connections are encrypted.
Use proxies or VPNs in everything. (Even physical goods)
Prison is not the end of the game, only a time-out.
Always find resources on your own, trust no-one.
It's not an easy (or mentally sound) path ahead, anon. If you walk this path you need to be aware that it will destroy you. Even if you think there is nothing left to destroy, there is. The fact that you considered suicide tonight shows that there is. You will become an empty shell.
Don't rush into things. Give it time, emotions are high at the moment, so relax and calm down for awhile.
Even if you do decide to go forward with killing this guy, don't let anger be the driver.
Now with all that said, I really hope you reconsider. You only continue the cycle of hate with this.
I can't say I'll be rooting for you, but this is your life, and your path to choose.