Is it love or is it infatuation or madness?

Hi i am in a relationship with a girl.Since i am a muslim therefore we never go out for a date or had any such thing at all.i know lot of muslims do that but i don't so telling you :)..frankly we haven't even touched each other...thats due to our religion..but we badly want to marry each other and since her parents don't like me for some reason and have asked her to stay away from me things began to get worse after that...we only used to spend our breaks together in our campus.and used to text each other..thats all...it might look like a weak relation to you people as you are from different society..but even with this much interaction we are together for the last 1. year...had stayed completely out of touch for about 4-5 months...only used to email barely during those days...but still nothing has been able to broke us apart...but my problem is my extra finicky attitude..i always appreciate her infront of others..but behind the scene...i dont let go of her for even her tiny fault...i always deliver a huge lecture on whatever she does wrong..i am always fault finding...and this is something i don't like..i feel like i am dominating her or moulding her...and it really makes me feel guilty...i dont want her to change herself...i ll feel guilty..but....there are lot of differences between the two of us...we think differently...and i cant control my mouth..i just speak out whatever is there in my heart..she is always willing to change but argues a lot not badly or rudely but like a child...she is always confused..i am determined..she takes a lot of time to understand a common sense issue and i get it on the spot..therefore i feel frustrated or feel like scratching my head.she loves me alot...so do i...her point is that things will change after we get together...and i feel the same way..cause right now our relation is underground so it has to sacrifice a lot of things..do you want to laugh more?listen to this now we dont even text each other for the last five months ie the time at which it came to her family's notice who later on imposed restrictions..we don't even meet on campus now..very seldom.but we text that too only on campus..don't laugh please.. :_(...and these bad days ve brought us even closer...but how do i explain to my heart? i am not good...i always lose my temper.honestly i want her to meet me frequently..but she doesnt and she has a valid reason.but how do i pacify my heart?and later on i keep regretting..and she forgives me as well...my point is that i am very very sensitive...and she always never ever deliberately but she does something that hurts me...we love each other...respect each other...and we want to be together...but how do i help these tiny issues that blemishes our beautiful and pure relation..