Realizing I have a problem. Advice?

I was 15 when I was diagnosed with anxiety and depression. I’ve had my ups and my downs dealing with this relationship with my mental health. I’m just now realizing at 21... I really REALLY struggle letting go of negative emotions. I had this fight with this guy friend of mine like three or four years ago and he befriended my close family soon afterwards. And he still hangs out and has a good time with them and I still can’t seem to let the hate go... like what?! Lol! And my younger sister and i will argue and I take it so personally and let it get me down when it wasn’t even something big! Could this be what my depression really looks like? Holding onto anger, jealousy, and negativity, and letting it get to me when it’s so simple to just let it go? I guess my anxiety is just very present to me because I can never stop with the overthinking and the panickyness that is my mentality. I just never thought about how my depression really presents itself in my actions but does that make sense? Does that even sound like what depression could do? Idk... any advice? please NO criticism. 🙏🏻