Nudes used as masturbation material! – She must NEVER find out!!

You know that feeling when you want to show someone photos and suddenly there’s a nude picture? That just happened to my girlfriend, and my reaction is just awful… I’ve always thought she was pretty, and sometimes there was a little spark when we hugged. I thought I just really liked her, until I saw that picture and instantly got wet, not just damp, WET! And then my brain kind of shut down, and I did something really stupid… When she was briefly in the kitchen, I grabbed her phone and went into the bathroom to… I’m really embarrassed, but I put her phone on the shelf above the sink, and then I started touching myself while looking at her picture. I came so quickly, and it felt so good, but now I feel so awful! I took advantage of her trust, and that’s not like me at all. But what confuses me even more are my feelings for her… Am I in love with my girlfriend?