What can i do for me thinking too much about the girl i love which is making me all the time nauseated?

Love sick?: What a joy to have feelings so deeply for someone that the individual is always in your thoughts! there is no cure for being "love sick." however, nausea is a warning sign that needs to be heeded if it signals organic disease--stomach upset from inflammation or overuse of nsaid's, gastric outlet delay, central (brain) causes, small bowel disease, gallbladder or pancreatic problems... Get checked.

Anxiety: You might be worrying too much about your situation. Maybe you are concerned if she loves you as much as you love her. This could be making you anxious and nauseous. It is good to have a medical exam first to rule out any underlying illness. You could seek psychotherapy from a clinical psychologist for a program to reduce anxiety, including breathing exercises. Medications can also help.