Before anything, take my words purely as advice. I'm not trying to criticize your writing or anything.
Now, I don't know the exact context and the relationship the main character(MC), Emma, and Camryn, and others had... but...
Firstly, though I have no idea what it's like to be in Camryn's shoes, her sentence 'I forgive you,' seems a bit too sudden. There's not enough time for MC to breathe and think and see his faults. If possible, stall the conversation between MC and Camryn for a little while and build emotions before you say that 'forgiving' statment. But if you think Camryn forgiving him right away is a must, then please do proceed. I just gave you my opinion, but in the end, it's your novel, so your belief in it matters before mine or anyone else's.
Secondly, you should avoid using the words 'really,' 'in fact,' especially because you're writing in MC's POV. Otherwise, it feels like you're forcibly making the readers believe in MC's feelings, which you don't want to do.
Thirdly, if you want to write in Deep POV to have a much greater impact on readers, then avoid words like 'felt,' or 'knew,' etc.
Fourthly, you said 'his friends gathered around him' in the first paragraph, yet you said that 'his friends voices sounded far away' in the second paragraph. Were you trying to say that because he was dizzy, his friends voice sounded like they were coming from far even though they were standing not far from him? I believe that you should be more clear with this.
Fifthly, you said 'he felt warm and wet in the gut' in the last paragraph. I suggest that you change this phrasing because it can lead some readers into thinking he felt better, though the preceding and succeeding sentences speak differently. Also, MC can't go from dejection/depression to feeling warmth in their stomach in the span of just a couple of paragraphs. So use different phrasing instead of 'warm and wet.'
Sixthly, as for being depressive, there’s no limit for that since you’re at the end of your novel. It’s all up to you.
Last but not least, I briefly edited your passages, and you can see how it flows:
I awoke and found myself propped against a wall. The searing stab
wound in my gut had missed the perfect spot, or I would probably be cold as a
corpse now. As the pain in my head split my mind into million pieces,
some feet fenced around me. I looked up, and there stood my friends
with expressions I didn't deserve to see. No words came out of mouth
as I suddenly remembered the cold truth that Emma was dead.
Pain painted my face with ugliness. My head tilted down in regret. Tears rushed
into my eyes, and I couldn't stop. I wept into my hands, horrible sobs
racking my chest as Emma's memories kept playing in my heart, proving
my (current?) pathetic self wrong again and again. Why am I still alive? The knife
shouldn't have missed the perfect spot. I don't deserve this life
you're not part of.
Still, my friends' gazes kept touching me gentler than the wind. I wanted to
raise my head, but the pain in my neck, or maybe my heart, didn't let me.
Blood still kept flowing out through my bandages, weakening me with
every second. I struggled to take a long, slow, raspy breath to steady
my vision before lifting my head with a great effort. I had to.
My eyes met with Camryn, who was looking back at me straight in the
eyes. ”I forgive you,” she said, her voice neither light nor heavy. (I
didn't change this sentence's core meaning because I don't know the
relationship between MC and Camryn.)
My breath shook. I had completely forgotten that I’d put her through the
exact same thing, yet she had the heart to forgive a fool like me. I wanted to bawl my heart out, but all my strength
was leaving me. I grew too weak to even cry for my wrongdoings. But
maybe I deserved this pain, flooding in my gut, in my heart, and in my throat. All
"I’d deserved for Emma to die." I didn't get what this last sentence exactly meant, so I left it.
In the end, I hope this example will help you at least a little. Cheers, and good luck for your novel.