Hi everyone!
So I have a crush on a classmate for the past 6 months.It's the most serious crush that has ever happened to me- I can't stop thinking of that person ,he has control over my mind 24/7,when I see him or when i see a text ,my heartbeat stops (which is a once in a lifetime experience for me as in general  I'm not emotional at all).Interestingly,this person seemed to be interested in me,he made his movements and asked me out several times.I rejected him continuously because I could not understand him as a person ,I could not understand his way of thinking,the intentions behind his actions generally in life,so I was scared to start a relationship with him.The thing is that ,as time passed by,he revealed more and more about himself and his childhood trauma by a narcissist father who died recently.It turned out tha he is polyamorous (that seemed scary to me, a monogamist) and has major depressive disorder(that seemed even scarier).The most scary part came a few weeks ago ,when he revealed that he also has BPD.I study medicine so I have an academic understanding about the pathophysiology and clinical presentation both for depression and BPD,but I had no idea about how is to date people with these characteristics.I searched the net and came across various fora ,including this one.I read some horrifying staff about BPD specifically,how they first idealise you and then out of the blue they leave you for no obvious reason but because of their fear of abandonment.Most people who are BPD survivors advise to not get involved with these people at all.Others say to get involved only when they are on therapy.Everyone agrees on avoiding these people when they are not on therapy,and my crush is one of them unfortunately due to financial disability.
So my question to the forum is what should I do?
Ideally I'd like to overcome this crush,but this is extremely difficult because we are obliged to see one another every day due to med school.
I'm scared to srart a relationship but i can't get him out of my system so I had thought several times to express how I feel explaining in parallel my fears.How does that sound? How will a BPD person feel when I tell him that BPD scares me and it's the reason I don't want a relationship despite having a huge crush?Will it be ok or could it trigger a suicide attempt for instance?
Any advice appreciated,I feel scared but I want him more and more everyday.

TIA