Was he not into me, then changed his mind?

guy i was dating………for about 2 weeks…..was cute full on, very into each other, and sleeping together….But he was leaving for overseas in a week so it could never turn into anything serious.

he told me he couldnt see me from sun till wednesday as he had a close buddy he grew up with staying with him. he told me she would be sleeping in his bed…and that she sort of had a bf..on off..
he also asked me to have dinner her and the sort of boyfriend on the sun….but he never called me about what time…

so i got angry and said if you have anything planned, i cant go , something came up……
Funny enough he begged to see me…then saw me every night and stayed with me…….

Why did he tell me he was sharing a bed with his buddy and that he was busy?