You'll be much better off as a couple if you can train yourselves to deal with irritations as they come up instead of bottling them up inside, which will be your instinct. Bottling things up, of course, only makes them expand and eventually boil over, and at that point, the tension you've created may be way too hot to handle. Unfortunately, if you tend to irritate each other on a regular basis, the only thing for it will be to deal with each incident as it happens, clearing the air for the next one.
Yes, this will be an annoying process, but it will be far worse to try to sweep your feelings under the rug, only to have them rear up later, far bigger and more insistent. This influence can actually have a healthy effect on your relationship if you can take it as a lesson in honesty and tact. You'll need both in dealing with each other, especially if your relationship progresses and you end up living together or getting married. But if you let tension build up between you too much, it could spell the end of the relationship.