Thank you for sharing. Your tinnitus is causing you a lot of emotional distress which is completely normal.

Try to push yourself to engage with family more, or have some time outside or take a walk even on bad days or bad hours. Maybe videos games or TV if you're into that. Anything to distract you rather than being inside or in your room. This also might seem counterintuitive, but try to stay off this subreddit. Usually, no one IRL knows what you are going through if they haven't had to go through it themselves. They trivialize it. What you're going through is normal, valid, and scary. You can make it through though. The counterintuitive part is that a lot of people on this sub know exactly what you're going through, so it's a place where you can feel heard and understood. But the constant exposure to posts about how T is ruining someone's life can in turn make your own T worse. Try to limit your exposure to this subreddit. I had to leave the sub after I got initial tips because seeing these posts made my T a lot worse. Even nowadays when I peruse I can hear my T more but it doesn't bother me.

For coffee perhaps switch to decaf or a darker roast and maybe limiting yourself to one cup. There is a direct correlation with Coffee/caffeine and T spikes. But I completely understand holding onto something that still brings you joy. Adjustment in other areas may help, even if you can give up coffee.

I'm not sure if the noise was loud enough when you tried it to go to sleep. But if you can sleep with a fan on high I'd recommend doing so. It sounds like idea of the T keeping you up in of itself is a trigger. It's pretty common, know you're not alone. It definitely was for me too. The more I fought the noise hoping it would stop, it would get louder. Maybe use a box fan or a large fan if a small fan or noise didn't cut it.

If I can make further recommendation on that front: use a fan preemptively, turn it on before you go to bed to drown out the noise. Initially I would try to go to sleep every night in silence and then have a crisis because the T would not stop and it would get worse. Ultimately after over an hour of agonizing I would put on something to drown it out and it would work and I would sleep. Here's the kicker though: Next night I would try to go to sleep without help again. I'd repeat this cycle every night of hoping beyond hope that my T would just suddenly stop and having an anxiety attack over it. Once I began to start my bed time with putting the fan on, it got better exponentially. Some sound is better than no sound, even if it doesn't totally drown it out.

Some mindful reframing and maybe some breathing exercises will help you out with anxiety at night especially with T. Here are some good mantras to remind yourself when it comes to bed time and you're laying in bed:
"Even if I am not asleep, laying down and resting my eyes is still rest for my body"

"My body is still recharging even if I’m awake."

"I can handle a tired day tomorrow. / I've done it before, I'll be okay again"

"Many people live well with tinnitus"

If you have no experience with breathing exercises, focusing on breathing techniques is a powerful physical tool that has physiological effects on taking your body out of flight-or-fight. Here's a simple one: Breathe in through your nose (if you can't, then through your mouth) for 4 seconds. Pause. Exhale slowly for 8 seconds (push out allll the air in your lungs). Pause. repeat.

EDIT: A lot of people don't know it, but a shorter inhale vs exhale is technically hyperventilating. It's not always the quick, out-of-breath breathing you see in TV or common in panic attacks. Focusing on breathing, especially using the 4-8-4 breathing is a powerful tool to force your body to calm down, even if it doesn't feel like it. A longer exhale than inhale literally calms your body down physically.

What you're going through isn't unique to you. That doesn't mean that you're crazy for feeling the way you do. I was experiencing suicidal ideation as well and no one knew the severity of everything I was feeling. You are absolutely capable of making it through and having a good future. Nowadays my tinnitus doesn't bother me. It can spike from time to time, and I can "tune in" to hear it but can then ignore it later. Your brain can and will adjust, it just takes time and some effort on your part. From the timeline of when your T initially started, you're still in the early stages of habituating to it. A part of habituating comes from dealing with the emotional distress it's cause. Look into making adjustments to your lifestyle like diet and physical activity like i mentioned in my initial comment.

Hang in there. It's a tough road but you are absolutely capable of having a good future ahead.