i was in a situation like this before. i broke up with my boyfriend, and i waited a bit to the point where he wouldn't be mad if me and his best friend went out...
...and his best friend and i are currently going out. so my advice is to wait a while to see if you have anymore feelings for your boyfriend, but if you really think you love his best friend...go for him
...and his best friend and i are currently going out. so my advice is to wait a while to see if you have anymore feelings for your boyfriend, but if you really think you love his best friend...go for him