<human>: Can you provide a brief rundown of the text in within 3 sentences?

A little background information: 
I worked a summer job as a shift manager at a small establishment where 18F (17F at the time) happened to get a job on my crew. It's a fairly relaxed job and she always was just really comfortable around me and friendly (I tended to kind of haze the new people). Well by the end of the summer I had developed a crush on her but she had a boyfriend so I never tried to advance it. About a week before she left for home (about a 2 hour drive) she asked me if I wanted to hang out and go see a movie or something. After a couple of little dates that we just called hanging out (even after she left for home) she finally told me she had developed a crush on me and she didn't even know why she started to advance it. (This really messed with me because I'm essentially a 6 foot 5 asian giant pushing 300 lbs who had never had a girl glance his way).

Well I thought we would just lose touch like all summer friends but we are in constant contact essentially 24/7. After about the fifth date we ended up sealing the cheating deal (and has happened countless times after) and after about the tenth we started telling each other we love the other (in a serious type of way). I make it a thing to try and go see her at least once a week which is a 2 hour commute but I just love seeing her. The thing is she brings up her boyfriend just as a normal "how was your day" type of conversation and it always kills me. I hate knowing I'll pretty much always be her #2.

Plus we have to keep it a secret. The only people that know are her and her best friend. This might not seem like an issue since i'm typically 2 hours away but I've had to look her boyfriend in the eye and smile as he shook my hand and said something like "Hey man I've heard so much about you and it was all true, you're great! It was awesome finally spending some time with you". It's pretty emotionally taxing on me to the point it's brought up some of my really bad drinking habits from my childhood.
<bot>: 18M is having a consensual cheating relationship with a 18F friend and wants it to be more but doesn't want to force her to do anything.