I was talking to this girl in the school cafeteria and I dropped my money onto the floor, she helped me pick it up and we accidentally banged our heads together, we then had a laugh about it and my girlfriend saw both of us together (like it was something else) and walked out. I later caught up with her and tried to explain what happened and she didn't believe a word of it, thereafter, she told me we should stop seeing each other as I "seemed to be having a real good time with other girls". I really don't know what her problem is (which seems immature now) and she keeps ignoring my phone calls and text messages. I've also been going round to her house to get some answers from her, but it's either her family who answer the door telling me that "she's not in". I just think she's doing everything in her own power to avoid me and it gives me no option but to leave her be (which I can't do because I still love her of course). My friends have also been trying to get her to come round to the idea that nothing went on in the cafeteria, and all they ever get in return is the cold shoulder treatment. The person who my girlfriend caught me with has also tried to explain to her that nothing happened and it was just an innocent moment - nothing else. I'm only 14 (still young and everything) and I'm really stuck on what to do next. I feel like I've given up already and I don't want to right now. Any advice please?