I think flirting is healthy and natural. it raises a persons self esteem to have someone to flirt with as long as you aren't having an affiar no problem
It is natural to have multiple flirtatious relationships and crushes, however, if you find that these crushes prevent you from developing healthy relationships, consider discussing this with a therapist.
Flirty crushes are not unhealthy, provided that flirting is all that is going on. As long as the other party knows that nothing will come of it, you are okay.
