I was wondering if there is any need for alarm, me and my boyfriend are going out now for a little more than 2 years he's in college and I work full time. We have a lot of fun togeter he stays with his friends a lot and I do my things with friends and all. My question is for the last 2 thursdays he forgot his cell phone home and I was wondering if its on purpose or it could just be a simple mistake. I am a little edgy because he seems to have lost a little interest latly. Am I looking to into this or ? What?? Actually come to think of it this was for the last 3 week now :/

Thanks

Your post doesn't say enough except that he has been forgetful. But, you are closer to this than we are and so I would trust your instincts.
The best way to find out? TALK TO HIM! Don't get paranoid and let it snowball. If something is on your mind, confront it right away and talk to him about what you're feeling.
Maybe it is something and maybe it is not. Maybe he is losing interest or maybe he is worried about finals or something. You won't know till you ask. So, ask. :)

I agree with manimuth - the only way to know is to ask. There is no need to make something out of nothing. He could be stressed out about something else and that is what is causing him to be absent minded (forgetting cell) and distant.