What should I do follow my head or my heart?

However random and maybe stupid some people might find this il still take any advice. Anyway I started to speaking to a girl over the net about two years ago. We met randomly online I got her email from a friend of a friend and so on. We started chating randomly about anything and everything because we where about both 16 at the time so its the stuff you do at that age. Soon we started to chat on the phone aswell (wev still shared special moments) , we both relised we lived far away from each other but not to far to be impossible to see each other. After a while we started to relise we liked each other and went on webcam to look at each other and so on. And we both liked what we saw and decided to go out online. But being young it was just a thing that didnt last long, and before we knew it we would arguee everynight about everything and anything. Then our friends got involved and it got out of hand. But over time we have always found away of making up and coming back to each other and being friends again and then saying we love each other again. But most times it ended like the first time. And wev been over it a lot of times. But recently we got back in touch after a fair gap and wer really close again and I’ve matured since and tonight we discussed all the things wed have to do to go out trust and beliving each other mainly. She lives in norwich and I live in birmingham and its only and matter of time before I can drive or catch a train to see her. But from all of this even though she has some problems but I still belive il love her even with them, because noone should be judged on anything that might be going on in theyre life. I know this is one big massive mouthfull to take in but after reading that but that gives a sorta idea of whats going on. So do I follow my heart and il love her reguardless of some concerns. Or do I follow my head and take my concerns that I dont think I can trust her? No matter what I always find myself draw back to her, as she does to me (Is it lust/Love I dont know). I really dont know what to think, can anyone relate or give any advice on the two questions above?