I'm sorry to hear, Well you need to move on instead of keeping the same old guy in your head.  It maybe hard, but trust me you will move on. :)  My crush moved once I was really, really sad.  And I didn't like boys from that point on (well now I do) But the problem is, is that it's hard getting over it.  Why don't you go out with your friends, to keep Mark off your mind, or why don't you tell your new boyfriend that your going out tonight (but lie and just stay home and have some alone time) sometimes you have to do a white lie to get past things.  Tom seems really nice but listen to your heart, and don't lie to yourself just think about it, don't worry when you think about something no one can see that thought.  So your thoughts are private. :) Who are you happier with, Who makes you feel great?, all these different questions.  Maybe if you get the answer your not hoping for don't fight it, your brain is a person of it's own.  And your brain never lies about something that's true :) good luck you will know witch path to take. :)  Im in my own issue and I'm really stuck LOL.  But still if you need me you can contact me at my profile,