Arranged marriage dilemma

Hello ! I'm in my early 30's and an artist who's still scraping just skin deep for a career in my field. My parents have brought to me a matrimonial proposal where the girl is related to me on my mother's side and in the final year of her UG in medicine. I was extremely skeptical and hesitant initially that I refused to even talk about it . My relationship history has't been anything promising either. I was either hesitant to take it further or just as hesitant to realize it can't go any further. In this case however I pushed myself to have a conversation first before ruling it out for good. The girl texted me and inquired about me for a short few minutes then immediately jumps to say ' I've loved you for atleast 6 years now, I've told about us to my friends , do your friends know about us ' . I'm like hold on now. We barely know eachother what's this love and people knowing about it ? I didn't bounce these questions on her though in fear of being offensive but wtf man how do I tell someone high on dreams to get real without being offensive like this so hard to do 😭 . Ik she's young and stuff but isn't it like asking someone to play the role of 'love interest ' in someone's expectation of life ? I feel bad if it comes to shooting down the proposal but damn that got me twiddling on my thumbs Any advice on what I can do to navigate this ?