From a mans point of view, I know what it's like to fall for someone and not stop thinking about them even after many many years. I moved to Puerto Rico about 3 years ago, I'm married and have 2 kids. While I was there, I was in a way hoping to bump in to an old girlfriend from when I was in the 6th grade. I never forgot about her, I always said she was the one for me. Don't get me wrong, i love my wife and would never want to do her wrong, but inside of me was the curiosity to see the ex again. Incredibly I did, and she was looking better than ever. She was a teacher which made it even more of a temptation. I eventually started to talk to her and we had a friendly relationship again. I however felt something from her, as if she was trying to reach out to me while at the same time she wasn't. She was suppose to be a religious person who is not suppose to do these things but trust me, I know when someone is trying. I felt the need to follow thru cause , as I said before, I always thought of her to be the one. I then realized what i was doing and backed off. I never went back to see her, I eventually left Puerto Rico and never looked back.
My point is it's not easy to forget and having the peson around does not help either. But it can be done, it takes time, patience and a little bit of will power. You just have to convince yourself that you can survive without him. Try to enjoy your time with Yohan, you never know. Maybe someday he will do something that will wow you to the point of saying "Darren who?".
And if not, there will always be someone else, other than Darren. I feel you, I've been there before. This from a guy, the world is coming to an end.