Stuck in my(22M) relationship with 21F and don't know what to do about it.

Hi everyone, I’m 22M and need some honest advice. I’ve been in a relationship for about a year. When it started, I was going through a rough phase after a fallout with a close friend. Looking back, I sometimes feel like I entered the relationship impulsively while I was emotionally vulnerable. The difficult part is that she hasn’t done anything wrong. She’s a good person and seems happy in the relationship. But lately I feel like something is missing from my side. For most of the relationship we’ve been long distance and rarely meet physically, so I wonder if the lack of real-life interaction is affecting how connected I feel. There were also a couple of moments that made me think more. On Valentine’s Day I tried to do something thoughtful and made hot chocolate for her, but her reaction felt very neutral. Another time when one of my exams didn’t go well, her response felt quite bland and not very empathetic. Now I feel stuck. Continuing like this feels dishonest, but breaking up would hurt her even though she hasn’t done anything wrong. Another thing that bothers me is that I’m only 22. Sometimes I wonder if I’m too young to decide my life partner, or what if later I meet someone I connect with more. I know some of these thoughts might sound immature, but I’m trying to be honest. I feel guilty because she seems happy while I’m the one who’s confused. I genuinely don’t know what to do. Should I talk to her honestly and try to fix things? Should I try meeting her more in person before deciding anything? Or is it better to end things now before it gets worse? Would appreciate honest advice.