Is it good to marry a girl in other cast? please tell me whether i can beleive my lover or not to the extend ?

i got a message in mobil giving me good morning and wishes. i replied and found its female. and we both spoke become thick in three days. forth day we met in beach and had in lodge . she is a professionaly doctor. we both found that we are not in same caste. i am bramin, she is scheduled tripe. she says she had committed mistake . she spoke in those days very affectionatly and after that she only made the situation to take up lode and had . now she says that her family may not accept. some time she askes me to consult with my family . she did not consult her family so far. its all happend in a two weeks. i dont understand about this female. she is doctor in naturopathy. staying in chennai and working alone. runnin her own cles. i am with my family memebers. if i take the decision to marry her,, my parents will not shwo any objection. but they will thing about their caste. as i am also expecting bride, and they also not in a position to search bride, they may not object. but my confusion is will i accept her,,, or not,,,? will she be reliable? will she stick with me till the last moment of life? is this true love or infactuation or what,, because she is 29 years, i am 31` years? we both are professionaly matured? i need advice from experienced elders or psychologist or psychiatrist or good counsellor? thank you very much for your effort for me,,,