Need help pl plz 10points plz help!?!?!??!?

Okay i have a gf of about 4.5 months and theres my ex that i dated in sixth grade. Sorry if this is long. My gf is a good girl she is sweet and beautiful but said somethings about me that kinda made me mad when i was around about my size.lol. Ive been wondering lately if she really care about me. She rarly says i love you back. We havent kissed either. My ex on the other hand has the same qualities but is kinda bad girl. So who should i choose? Plz i need help ive been stuck on this for a while