Dating is haram
This girl is Muslim, she practices prayer (salah) and she wears veil (hijab).
First I'd like to mention that the mixing in schools, universities and is haram and very dangerous especially for young and also for adults. The Prophet Muhammad PBUH said in the Sahihayn: For this reason many scholars have forbidden to go to mixed schools and universities expect for some cases mentioned by some scholars.
Because the Prophet said: "يَا مَعْشَرَ الشَّبَابِ مَنِ اسْتَطَاعَ مِنْكُمُ الْبَاءَةَ فَلْيَتَزَوَّجْ فَإِنَّهُ أَغَضُّ لِلْبَصَرِ وَأَحْصَنُ لِلْفَرْجِ وَمَنْ لَمْ يَسْتَطِعْ فَعَلَيْهِ بِالصَّوْمِ فَإِنَّهُ لَهُ وِجَاءٌ" 0 young men, those among you who can support a wife should marry, for it "restrains eyes (from casting evil glances) and preserves one from immorality; but he who cannot afford It should observe fast for it is a means of controlling the sexual desire." [Sahih Muslim]. This is not permissible in any way, as any and all kinds and forms of relationships outside of marriage is against the Shariah and not of Islam.
If you love this women you should marry her through the way described in Islam, if not then you should stay far away from her, and she should stay far away from you.
Since you're aware of the possibility of sin, there should be guidelines that you must keep in order for you to have a halal relationship.
And search in the net you can find a lot of stories which started with an innocent relationship and finished by disaster like Zina.
And you should don't say that your are mature and you say what are you doing. Because no one can avoid the sedition without avoiding the way which leads to it.
Because we have two main enemies our souls and the devil who always we push us to do evils. So you should cut your relationship and stop talking with her expect the extreme cases.
Family involvement in the choice of a marriage partner helps assure that the choice is based not on romantic notions, but rather on a careful, objective evaluation of the compatibility of the couple.
That is why these marriages often prove very successful in the long-term.