advice

okay so i need to rant about a few things in my life!

first of all, my best friend is having a big party for her birthday coming up. the date she had chosen i was unavailable and i told her that. so she said oh no i will try change it to a date when your free. and i said no no don't worry about it. and she said no its okay i will change it because i really want you to come and i said okay. 3 days later she sent out invites (i didn't get one). i soon find out she's having it on the date that i said i was unavailable! and im really annoyed at the fact that she could have just told me that she couldn't change it but she didn't! ARHHHH please advice is welcome

my second issue is that, my boyfriend and i tell each other everything and we are very close. this afternoon he sent me a photo this girls instagram account. and i said what about it? and he said to look at the recent post. and it was a screenshot of him on facetime with her a few nights ago. but the whole reason he told me to look at it was because he thought it was funny because he didn't recognise himself. BUT! i am a bit annoyed that he's facetiming other girls that im unaware of??? like fair enough if she's your friend and all but this girls is his ex's best friend.

PLEASE HELP AND GIVE ADVICE

ps. sorry for the rant