Seeing as "love" is a neat little biochemical trick of pheromones and hormones to get people to have sex with each other, having no premarital sex is quite a dumb thing.
Also, there's another point speaking against a relationship with that girl:
If she just not doing "the act", but oral sex, petting and masturbation are okay with her, she's obviously a hypocrite.
According to the bible, sex only has a procreational meaning, and any "fun" derived from it is actually sinful. So any sexual act NOT making you have babies is as much a sin as premarital sex, even if you don't penetrate her vagina.
So she can't possibly be a true devout christian, but is, to speak in internet terms, a mere religious troll.