Is it to weird to create a fake profile so I can look at my ex's profile?

If it were me in your place, I would want to let go of the ex. I don't think it's emotionally healthy to cling to an ex like that. I'd move on. Find another person to date, and just forget about her. I know it may not be what you want to hear, but my advice is to do that.

We've all been in your shoes. I got dumped by my first college boyfriend without explanation. I just moved on with my life. I then got a boyfriend I actually liked better than my ex.

Try not to obsess over her. Let it go. You'll find another girlfriend. There are a lot of nice girls out there. If you have not brought finality to your relationship with your ex through a relationship-ending discussion, then I suggest that you do that. Discuss with each other what went wrong. She owes you that much after a long-term relationship. Call her on the phone to arrange a meeting. If she is currently mad at you, wait until the storm goes away then have the talk with her. This is the only way you will be able to let go of her. Don't stalk her on the Internet. That won't solve your problems or your anxiety about the break-up.

that is beyond weird and makes you a stalker and if she ever finds out could have you arrested