It is normal to desire your (intended, prospective etc.) spouse and the proper method to increase your agape love for your spouse is certainly not by killing the eros love, or the desire. You wonāt love a man more or even more purely if you pretend that heās ugly or he smells.
In fact, you wonāt really love any person better if you suppress the realisation that he or she is nice to look at (again, even if that person is of your own sex!) or even attractive. Doesnāt every mother think her son is handsome? Even if no other woman would think that?
Finally, infatuation does not have an ugly head. Lust does. Infatuation can have a stupid head (like an airhead) but not an ugly one.
For the record, I routinely experience at least a mild degree of sort of a crush on nearly every female friend I have or have had (as well as a couple of marvels of creation, especially in the external form, whenever I go outside for a prolonged time, e.g. on subway) and I believe this is normal (as in not even everybody experiences it, but normal in the āmedicalā sense). They sure as heck are all lovely girls very much worth loving. Obviously, not all of them would be happy with me or I with them and certainly I canāt have them all (or more than one), not like Iād even want to, and they canāt have both me and some other guy (e.g. the guy they want to spend the rest of their lives with). In such situations, you donāt blame yourself, you just smile, try to turn it into something good and move on. Basically just donāt start lusting. Lusting means feeding a desire to use that person selfishly for your own gratification. Noticing a personās physical beauty or even desireability as a mate (in abstract terms or even for you specifically) is long long way from there.