Discharge??????

Ok so, I've been on the pill too, if that helps out this question/story. 
I've always had a lot of discharge, like always. But when I'm near my boyfriend, it's nonapparent. Like I have none, ever. We hang out from like morning until 12 am everyday, and we have sex maybe 4 times a week. But recently, I had to stay at my sisters for a month across the country, and I went back to my discharge days. So, like is my body sensing his and that's why I don't produce or what? 🤔