Girl friend Problems?

Me and my Girlfreind have been dating for 3 months so far, and i dont know whats going on but i have this weird feeling. She plays sports and i dont, i get jelous over her for some reason and mad but i love her. all the boys in her cl flirt with her so it makes me mad, and when i tell her how beautifull she is and everything, all she says is "aww thank you" and practically repeats what i say also. for example, i say, "i love you baby your so amazing" she will say "awww thanks, i love you too, your amazing" and it gets on my nerves... i went through 2 weeks planning how to ask her out, ive poured my heart into her, and she hasnt done crap for me barely at ALL... :( when i want a heart to heart conversation about problems im having she says "im sorry" and i text like 5 pages to her about my problems and thats all she says... What do i do?!?! i dont know how to handle all this, i love her so much guys, i dont want to lose her... but gosh. what am i going through? what do i do?