Is it normal if nothing hits me emotionally?

I sometimes think I'm heartless but I'm not. I am caring but things/events don't hit emotionally as if I have no feelings. The best example is the loss of my brother. Yes he past away, I was sad, I miss him but in all honesty, when those cops came to our home and told us the news, yeah I was in shock but I had no emotions to this day. During his funeral, I was basically putting on an act. It's not like i didn't care, I just didn't have any emotions. OTher cases are when I don't take things seriously. I'll get depressed for a minute but then I make fun of the situation and don't take it seriously. Is this bad or good? It's adviced to not take things too seriously and just have fun however, doesn't it cost you in the long-run? especially with work or school? I have a bad habit of not taking things seriously and idk if its a good thing to live a healthy, happy, easy life or I should start taking things seriously and stress about serious situations because it's not a game? If something bad happens at work or school, I'll laugh about it and not take it seriously. Like it's not the end of the world but there's a voice in my head saying hello this is your future on the line. I just seem to live life freely and carefree and my way and that's it. Although I have people like family wanting me to be successful including me, at the same time, I just rather not stress over something that'll cause me pain and negativity. However, the only time I have actually felt emotion and sadness that I cannot just move on from is since I've been seeing my dude. He made me feel something and every time something goes wrong, I can't help but FEEL this sadness and vulnerability. And when things go right, I'm just so happy. He's the only thing in this world that has hit me emotionally and I don't want to lose him. It feels good to feel something especially for something so worth it. You don't choose how you feel. You can choose to not go through with that situation but your feelings aren't gonna change. I've been easily choosing to not care because I naturally don't care. In the case with my guy, I naturally care and choose to go through the stressful times with him. But besides him, I don't seem to carry emotions.