Love? Or obsession?

Okay so for a bit of background I don’t often have interest in people? I find it very hard to keep up with conversations and relationships, with everyone my social battery runs out so fast and I find myself not speaking to anyone for weeks because of it. I have one person that I genuinely love speaking too, shes my best best friend and for the purpose of telling this story my “first love” I’ve only ever truly loved one person and that person is the girl who made me realize my sexuality, I never ended up telling her but what I felt was so? Intense? To the point where I felt like I was obsessed with her, I’d do anything for her and still will and every relationship I’ve had could just never compare, none of them ever had that same spark that she gave me..up until recently? I met someone and we instantly clicked exactly how me and my first love did, like they were a reflection of me but with more depth and quirks. And now I find myself going through the same route as I did with my first love. The thing is to this day I can’t tell if what I felt was love or obsession (for my first “love”), so just like back then I can’t tell if what I’m feeling is a crush? Or? For my new “crush” I don’t want to date them, I feel like that would complicate things and their in a 2 year relationship! And I’m not a home wrecker but..it’s so weird, I want them. I want to be someone special to them I want us to have a connection, I want to hear them laugh I want to see them cry I want to experience everything and anything with them, I’m okay with sexual things if that’s what it comes down too but it’s just. So intense, the most overwhelming feeling. I just want them to be apart of my life in any way. With my best friend/first love it was the same way I completely wrapped myself in her, she was just the “acceptation” to so many things in all of the years I’ve known her. Sorry I know I wrote a lot but it’s so hard to completely explain! I honestly don’t know what kind of feedback I’m looking for, does this sound like obsession? Is this what a crush is supposed to feel like? If someone told you they felt this way about you would you be creeped out? Lmao