Is it normal to find lovesickness more interesting then love itself?

I've experienced both, with the same person. I definitely enjoy the happy feelings of love. I could describe how I felt, but I'd end up writing pages and pages. So I'll keep it simple. Me and this person basically became long distance and at first, I used to see him every day, now I see him maybe once a month if I'm lucky. The lovesickness was hell on me both physically and mentally. My appetite, motivation, and energy was gone. I felt nauseous, tired, irritated, upset like I was ready to cry. There were nights when I had shed tears. It was unbelievable to me that I could feel legit sick over this. I'm doing way better now, but as I reflect from it, I'm just more interested in how the body reacts to lovesickness then how it reacts to love.