I really like this person but he/she is a lot older/younger than me. Is that OK?

Whether this is OK or not is really up to you to decide. Everybody has their own beliefs and experiences and nobody can tell you who you should or shouldn’t date. The exception to this is if you are under 16 years old and have sex with a person older than 16. This is against New Zealand law and the older person could be prosecuted for statutory rape (having sex with a minor, regardless of whether both people agreed to it).

There are a number of things you might like to consider, such as “Are my thoughts and desires respected by my partner, or do I get pushed around?”, “Will my partner be accepted by my friends/family?”; “Will my partner want to hang out with my friends?”; “If we spend the rest of our lives together, will the age difference be an issue later in life?”.

There are probably many other factors to think about that are important to you. One other consideration is children. Do either of you want children? If so, when? Can you and your partner agree on a time suitable for both of you to have children?