What do you need to get off your chest? [serious]

I'm in love with someone, let's call her O, and I swear to god I've loved her from the moment I met her (about four years ago). Like I don't believe in love at first sight, but there's no other way to describe it.

I'm also two and a half years into a relationship, and she's one year into her own. I'm happy, and I think she's happy, but I can't stop thinking about being with her.

I feel like O has felt the same way since the beginning, which could absolutely not be true, but there's no way of communicating any of this with her unless we're both single, which I don't see happening anytime in the near future.

I think it's bullshit, and stupid, but try as I might I have never been able to stop feeling so strongly for O. I definitely don't feel this way about my girlfriend, so does this mean I don't love my girlfriend? Or is it just the excitement and the anticipation that I'm mistaking as true love? I don't know, and I'll probably just continue to be friends with O and date my current girlfriend because it's easiest, but sometimes it just becomes hard to live with.

/r/AskReddit Thread