Near the eject button on your drive there should be a small pin hole, inset a straightened out paperclip into it and push firmly, this is the emergency eject that is built into almost all optical drives.
Once you've removed the disc, try another clean, unscratched disc, preferably of another type (cd/dvd/dvdr etc)
When you say that My Computer doesn't load, did you mean the disc or my computer?
If it's the dvd drive, then to me it points towards either a power issue or a broken eject button/switch.
Has the laptop received a slight knock at all? What has happened to it between now and the last time the drive worked ok?
You could try to remove and reseat the drive, they're usually held in by a few screws or sometimes just a sliding clip on the bottom of your lappy. Make sure it's powered down before you try this. It could help if it's just a bad connection.