AroAce people unite (and help)

I've never really cared way too deply about romance and sexual orientations, only on a surface level to not be lost, and to know myself better. For a few years now I've labeled myself as a "pansexual", I've never gave a * about who and what to love, although I'm still young to have too much experience, so I never really spread the information, nor was sure about it. I've been in relationships before (both with males and females). At the start I've always had the excitement that "Oh yay I'm in a relationship!", but it always faded overtime, it sometimes even felt like a chore, and it generally wasn't my top priority. Now don't get me wrong, most of my partners were kind, loving and amazing, so I wouldn't say that it was because I was treated bad or didn't like the person. Although breakups did not effect me much, and I had no problem staying friends with them. It just felt like the same. I also cannot make a difference between romantic and platonic love, and I'm starting to think that I never actually felt romance. I don't want to rush things, and won't immediately label myself as anything people say, I still have my whole life ahead to decide things for myself. But I'd still like to atleast have a clue on what's going on inside my head and heart. Can be brutally honest, and thank you in advance if I get any advice or just a simple subtle clue.