Status: It's Complicated...Still :/

Right now Ben is camping and I miss him.  We got to hang out on Saturday and I got to meet more of his friends.  I hadn't seen him since he invited me to a wedding and where I also met more of his friends.  At the wedding he either introduced me as his "lady friend" or by my name.  Idk if his friends think I'm his gf or not. I know he did once show some of his friends a picture of me and told them that this was the person he was seeing.  Idk if these were the friends though but I did find it funny how this group of friends they are either single or in a relationship in threes.  So Ben and I  now made the third part of the relationship and one of his friends was recently single and now made the third person to be single.  He also went to a party and was telling people all about me, his girlfriend.  I'm pretty sure his friends at the wedding thought I was his girlfriend but I'm not sure about the friends he introduced me to on Saturday.  It was a little embarrassing that everyone was dressed up except me. :/ I thought it was going to be a casual night so I decided to save my nice clothes for another night.  He did make efforts to hold my hand and stand close to me whenever, so maybe.  However, he did introduced me as his friend but maybe he said girlfriend but couldn't hear because there was a lot of people outside the movie theater, so maybe.  I wanted to ask him after the movies but didn't know how to bring it up.  I know I can talk to him about anything but I don't know how to ask.  I looked up some ideas but I'm still a little nervous on how to bring up "DTR." I think it also has to do with my past relationship and how that relationship just destroyed me in every way possible.  I know Ben is nothing like my ex but the wounds of my past remain as scars but most have faded now but some still show but are gradually fading.  Also, another part of me is old-fashioned and want that romantic way of being asked to be Ben's girlfriend officially.  He claims to be a romantic but yet he hasn't asked me to be his gf officially.  I know we are unofficially a couple but still, it would be sweet to be asked to be his gf and celebrate anniversaries.