Per the 22nd Amendment, someone who has held the office for more than two years of someone else's elected term is limited to a single elected term of their own. So if you've done two or fewer, you are still eligible to be elected twice. Those two initial years plus your two elected terms would be ten years.

No person shall be elected to the office of the President more than twice, and no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once.