I think it's been two and a half years since I broke up with her and I still feel an attachment to my first girlfriend.
Why do you think that it is a problem that you think about her so much?
Because I worry so much about what's she's doing at the moment, whether she's safe and healthy.
Ending a relationship doesn't stop the feelings you had for the person but after a few years you should have moved on more. It would be good to seek help so that you can finally move on.
It should not be a problem to think about her after two years, should it? If it is, even still I can't stop thinking about her.
Yes two years is quite a long time, you should get someone to help you forget her indefinitly so that you may move on with your own happiness. Worrying about someone who you broke up with is not going to help you with your next relationship.