Boyfriend with girlbestfriend

My boyfriend has a girl bestfriend. She’s a lesbian and has a girlfriend. My bf sets boundaries but they have been hanging out a lot since they live near each other. They have been friends since highschool (college kami rn) and they tell each other almost everything. Sakanya siya nagkekwento ng kilig kapag nagda-date kami, and vice versa. May mga times din na di sya uuwi right away to hang out sa place ni girl to just yap.

Earlier in our relationship, they are anxious how I feel sa relationship nila since my bf knows one of my non negotiables is when a guy has a girl bestfriend. Pero sabi ko okay naman ako with their relationship until lately na parang lagi sila magkasama. Busy din kami both ni bf lately so minsan sa gabi nalang kami nakakapag usap, kaya kapag free time namin I want to bawi sana pero kapag free sya he’s hanging out with her and maaga sya natutulog so pag uwi nya is di na ulit kami makakapag usap because he’s sleepy already (he’s apologetic of this naman).

I genuinely don’t worry about cheating stuff kasi I trust my bf and this girl na purely platonic lang. What I don’t understand with myself is minsan nawawala ako sa mood everytime they hang out with each other. I don’t know what I’m feeling. Ayoko naman silang paglayuin, I am not controlling. I feel so shitty kasi never naman ako binigyan ng problem ni bf with girls.

I feel selfish when I say this but I’m gonna say it— I want me to be his bestfriend and not anyone else.