You're going out with who was previously your best friend.
Best friends are best friends because they share similarities. Lazy or hopeless guys love their best friends' girlfriend because he would like the same kind of girl.
you tell him and ask if your really best friends, because best friends should never ignore you
That's up to you.
Cheating
Yes they can become very good friends. It isn't illegal to be friends with the opposite sex and only be friends. But if they have a boyfriend or girlfriend then i don't advise you become best friends with them because their other will feel competition with isn't good. Unless they are gay/lesbian then it wont make the other feel less loved. I hope this was a help~!
you should apoligize t your friend and his girlfriend
try to become friends with that person that your best friend is friends with. MAybe you can become a trio.
You should leave things how they are for now. Frienship is more important. If it really becomes an issue, talk to your friend about it- let them know how you are feeling but state that you wont pressure feeilngs because they are together. Best of luck!
Wait until they break up then ask.
Try to trick him or get wasted is what i do
No just best friends
.............you can tell if your girlfriend is envolved with her best friend because she will be extra emotional around her. She will touch her alot and talk about her all the time.