<human>: I am 19F currently in a pretty serious relationship with a guy I met in college 10 months ago (he's 20). I have had nothing but good times with him and I can see this relationship lasting for a really long time. However, I recently got hit with some extreme nostalgic feelings for my high school bf, my first love, whom I dated for almost 3 years. He showed up in a dream where we awkwardly tried to reconcile (we haven't talked much since I started dating my current bf), nothing sexual, just talking about the past, and I woke up thinking damn, it would be nice to talk to him. Then a picture of him showed up on a friend's facebook and I was struck by how frigging attractive I still find him. 

Since then I can't stop thinking about how awesome our relationship was and all the little things I miss. I can't really compare him to my new bf because they are such different people and the maturity level of the relationships are so far apart, but I just can't help thinking that I wish my current bf was more like my ex in some ways (for example, god I wish he was confident like my ex was!).

These feelings are totally new, we've been dating for 9 months and I haven't seen my ex for about that amount of time.  I did just return home (where ex lives) for the rest of the summer, so maybe that triggered it? I just don't know what it means; I can't stop thinking about my ex and it's making me feel so guilty. I know it wouldn't be reasonable in any way to get back together with him, that's not even crossing my mind as a possibility, but I just can't stop thinking about him and the vast difference between him and my current beau. 

So my question is reddit, is this showing something about the state of my current relationship? Or is it normal and nothing to be worried about?

Can you condense the text into three sentences or less?
<bot>: Happily in a steady relationship, suddenly started intensely missing my ex. Is it possible that I'm not as happy as I thought?