So some context on how this kinda started...Me and my friend met via a dating app and began talking eventually we go out after about 2 weeks of talking. I'm all excited I get dressed up for my first real date in 2 years so I'm nervous and get to the spot we agreed to meet at for the evening I had planned. She's beautiful cute and short and exactly what I'm looking for as far as dating goes. Anyway night finishes and we continue to talk and get teased by this older gentelowho starts singing "Kiss the girl" from my little mermaid we both have a laugh and I jokingly say "Mabey we should" to which she responds with "I usually don't kiss on a second date" no biggie her ride shows up and we depart. Fast forward about 2 weeks I've been trying to arrange a second date but she isn't ever feeling too well so I try to be understanding and patient since I really like her and not mabey a day later find out she's just going out with another guy who she "really likes" and says we should just be friends. Little heart broken but it's alright we stay friends and watch her hurt herself 4 times in a row with men who are just using her knowing I could be doing so much better for her but there's no in for me and I do still have feelings for her and am repressing them for her sake so we can stay friends but it irritates me when she continues to hurt herself when the arguably solid option is right in front of her. I'm not sure what to do or how to proceed since I am almost nothing except pissed off when I'm around her. I'm at a loss since I really had a lot of feelings for her and even felt butterfly's in my stomach when we would talk... Hopefully that made sense I kinda just word dumped after a bit there. I just don't know what to do about it.

TLDR: In love with my best friend who I am struggling to keep from pissing me off at every turn