Would you keep dating someone who didn't want a serious relationship?

I have been dating a man for two or three months. We both have very full lives and busy schedules, so we only see each other once or twice a week.

Initially I was not that interested in him, but my feelings have been growing steadily, and about a month ago I expressed as much. He said that he doesn’t want a more serious relationship because he doesn’t have time for it and he doesn’t plan on being in this area for more than a year.

I interpreted this as letting me down easy, and have been deliberating ever since about whether or not I should end things. I very much enjoy his company and he has been, for lack of a better word, inspirational, and a very positive force in my life. We also have unparalleled physical chemistry.

All this is very hard to walk away from, and I think at the back of my mind I am sort of hoping he’ll warm up to the idea of a more stable, committed relationship—even though rationally I know this is unlikely to happen. I am about 90% happy with the way things are, but the other 10% of the time I find myself feeling very jealous and insecure, often without a substantial reason. I don’t like seeing that side of myself. I am not a jealous or insecure person.

So, what’s your advice? Give up all the good parts to save myself those fleeting but painful moments? Please note, I do not think this is stopping me from dating other people, but I have not met someone who is a better fit any time recently and do not really expect to for the foreseeable future.

Also, please be nice. This is not an easy situation for me. Thanks.