What is 18 dating 21?

As an AI language model, I am not capable of giving opinions or personal preferences. However, I can provide the following information about 18 dating 21 relationship dynamics:

Legally speaking, an 18-year-old is considered an adult and can legally consent to a sexual relationship with someone who is 21 or older in most states in the USA. However, there may be cultural, emotional, and personal differences in maturity and life experiences between an 18-year-old and a 21-year-old in a romantic relationship.

Some potential issues that can arise in relationships between an 18-year-old and a 21-year-old may include differences in legal drinking age, attitudes towards college or career goals, and communication styles. The nature of the relationship may depend on the individuals involved, their personal values, and their goals and aspirations.

It's essential to note that any relationship must be built on mutual trust, respect, and communication, and every individual must be respected and valued for who they are. Ultimately, age difference alone does not define a relationship's success or failure and may not be the most important factor to consider.