See hes already in a vulnerable stage...the seeds of doubt is still in him..n Cmon the guy who has not had his first intimate moments wit her wud feel.betrayed...i do understand tis thingg cos its nit jealousy ..but possesiveness of smething that is truly urs n u dont want to share it with others...He is feeling bad cos those things were already in his mind n upar se tis view of seeing her envelop in someones arm which no lover would tolerate!!