Trust with a capital T

You fall in love, get married and think you are going to have an And then they lived happily ever after marriage. But no, hubby doesn't quite trust you....

Mine was a love marriage. We were totally in love and got married. Our parents too were rather happy for us because they felt it was a mature decision. But after a month, I noticed that my partner was constantly questioning me about everything.... about what time I left the office, how I came, who I saw on the way, the phone calls I received.... I thought he was doing it out of interest and was so happy that he wanted me to share every detail of my life with him. But then, I noticed slowly how he would check my mobile for calls received when he thought I was not looking, or cross examine my colleagues (whenever we ran into them) on certain activities in the office. I think it is great to be possessive about one's partner, but this seems to be a rather extreme case. I am uncomfortable and do not know what to do.....