It jus aint sittin 2 well with me... Can u help me out?

Today is my boyfriend bday we had plans on goin out tonight. i called and texted him a few times today but all my messages were a delay! so once we kinda got ready 2 talk i asked him if everythin was still goin on and he said yes... a few seconds later he cancelled so i was like ok! something told me 2 call him back so i did but i blocked the # i heard sum girl in the back so i jus hung up and called again she answered this time talkin bout who the **** is this so i jus hung up and called back wit my real number nobody answer!! so i tried 2 call a few times then i jus left a smart message and u kno jus waited around! he called me back talkin bout wat am i mad 4 that was his friend girl and she answered the phone cause it jus was jus sittin there and all this crap! i mean im kinda pissed but i aint stressin but i mean it aint like he didnt cheat before! i kno that i have the right 2 be mad but should i jus drop the issue or jus lay low 4 awhile?? tell me wat u think please