<human>: Summarize the given text in a few sentences.

So lately I've been dating this really nice girl. She is 17 and I'm 22 (almost 23, our age difference is 5,5 years).

During our dates it hasn't caused much problems, we have enough to talk about and although some things she says sound childish to me, I don't really care about that. 

But if my mind takes this to a long-term relationship, I'm aware of a few potential problems. I've been in a 5 year relationship (from 16 till 21), and she has had only 1 short relationship (about a year). This would probably cause a huge gap between both our experiences and behavior in a relationship.

Apart from the problems between us 2, I found that some friends of mine think that the gap is a little too big too. I'm afraid that people will judge our relationship by our ages, not by the persons we are or the love that is between us. I haven't told my parents yet, and I'm not really sure how they will judge it.
<bot>: What are possible long-term relationship problems that an age gap of 5,5 years might cause? (between me and her, for our friends and families and for other outsiders)