<human>: I'm 20, and my girlfriend is 18. We've been dating for almost 3 years. I know we're young, but we love each other very much and are both very close to and liked by each other's families. I'm with her very often, and when I'm not we talk on the phone for at least an hour per day.

As much as I love her, I'm not sure if I'm emotionally mature enough yet to deal with being in a relationship that could potentially last my entire life. I've been thinking about going on a break for a bit. I won't be using this as an excuse to go around talking to other girls. I just want to be sure that we both love each other as much as we think we do. If I can let her go do her own thing for a few weeks, and if she still come back to me, my confidence in our relationship will be validated and I will know she is someone I can see myself with in the future.

Should I do this?

Can you summarize the given text in a few sentences?
<bot>: 20 y/o wondering if he should initiate a break from seeing 18 y/o girlfriend of 3 years to test strength of relationship.