Am I too jealous of her?

First off, I don't want to sound like a whiny teenager without a life (I'm not). With that being said, my boyfriend/ future husband and I are both juniors at the same university (in different majors). The majority of his classmates are female, which is fine with me. He studies with them a lot, and talks about them several times a week. (I do things with them, too, so I do know most of them) This one girl is beautiful, sweet and funny... in fact, if she wasn't a completely different religion and didn't have a boyfriend, I would be worried. Anyway, for Christmas he made her a coffee table for her apartment and she gave him a really nice sweater! I didn't hear that any of the others gave or received gifts. He and I haven't exchanged gifts yet merely because we haven't had the opportunity. This is our first Christmas officially together so I didn't know what to get him, hence her's will be much nicer than mine.

Is it silly of me to be so jealous of her? I know how he feels about me and that he wants to get married after we graduate. but he made her a coffee table?? we didn't spend much money on our birthday presents this past year, so it surprised me when he told me his "project" was for her. I guess I'm just nervous that he won't like my gift. Is this a valid reason for feeling this way?