How do you guys control your jealousy when it comes to your partner(s) and their (platonic!) friends?

I always thought I had a solid grip on my jealousy (ha) but then I started dating a guy who basically only has girl friends. Like, almost 70% of his friends are girls. And I'm jealous all. the. time. 

It's so exhausting! I don't want to fight with my boyfriend. I don't want to ask him to hang out with his friends less often. I don't want to feel like trash every time he goes rollerblading with a female friend. 

I feel like I'm handling it the best way I know how. Taking time to think rationally and calmly before getting (too) emotional, using "I feel" statements instead of getting angry and putting the blame on him for having friends, etc. And I feel like he's handling it well too and being so understanding. But... I don't want to *have* to do that. I don't want *him* to have to do that! I just want to be genuinely okay with him having a life and not feel jealous about him having friends. Is that even possible with BPD?

The dumbest part of this whole problem: almost ALL of my friends are guys. I am frequently the only girl in a group of guys and I thought I would be so much more understanding than I am. I'm so hypocritical when it comes to this and it is so fricking exhausting. I feel crazy :(