I broke up with my girlfriend because i didn't want to take her virginity, i'm 21 she's 22?

1st of all let me point this out i am a very considerate person sometimes too considerate what i think is my downfall, iv'e been dating my girlfriend for about a year now or a little bit over that she is a very weak person at heart very soft spoken and i try my best not take advantage of her cause i respect her so much and care for her i'm her first BF she has always feared relationship just hearing of people's experience's cheating, want them just for sex, etc ,when we started talking i made the point that i wanted to take this relationship by steps i wanted us to have a strong mental communication together and eventually down the road sex would come into place , through out the year iv'e been there for her help her out with countless things she would call me when she had stressed day at work and she has it very often because she's weak people walk over her just by her appearance u can tell the type of the person she is ,she has mood changes a lot and she's easily stressed out over the most trivial things but i deal with it because i care for her she's humble kind and she has a beauty i swear only i can see, after the year we got closer to each other she told me that she love's me to honest i wasn't in love with her but but my feelings for her are high so i know it would eventually reach to love ,it came to a point in the relationship i wanted sex i know if i asked her she would say yes i know her like that plus i had more than proven myself to her that i don't want her for just sex but the thing is i wanted it but on the other hand i didn't because i don't think i would be able to deal with the stress she's going to go through knowing her if we had sex she gonna hurt herself stressing over it and if i say anything or doing anything that seems like i'm losing interest she's not gonna be able to take it, i'm just thinking about her i don't want to hurt her, our relationship is find with the communication but if the sexual part of it can't be satisfied doesn't really make sense to me...thats why i've decided to just leave it as friend's i think that's the best way to deal with this i still be there for her as friend just not as a lover i..i just think that i am not suppose to be the to take that from her plus she christian i know she strong believe's in waiting till ur married thing i know she will break that promise for me cause she loves me ..i just thunk that she would be better off finding christian guy that will hopefully treat her the same , i think i've done the right thing put urself in my shoes and give me a honest answer people i will greatly appreciate it