About half a year ago I started talking to a girl that used to have a huge crush on me back in school. She was in a failing relationship and we hung out twice, first with two other friends and then by ourselves. The first time, we just talked and my one friend tried making me look good (though I didn't ask/need him to). After the first, she messaged me saying how cute I was. And the second time we just watched a movie, I layed my head on her lap and before the night was over just a tight hug, lifted her up and she said she'll miss me, stay safe, and to come home soon (I was about to deploy to Afghanistan). Over deployment (which is still happening) we would message each other and she would still say she misses me and to stay safe.

But now she has another boyfriend. The weird thing about it is that the second night we hung out it was at my brothers house and my brother/friend came in towards the end and saw me with my head on her lap. And I told my brother I was trying to start something with her, I'm not sure if he told the friend. And now the friend and her are dating.

My question is simple, do I still keep trying to talk to her as friends?