I (24 m) was brave enough to ask her (33 f) out finally and she rejected me with poor excuses, I followed my instincts, what am I did wrong?

Barksdalejr

we have a little gamer grp, close friends and family members and she was one of our friends, i know her from 2 month and every single day we chatting and talking and get to know each other, we had closer bond with the others, she was very talkative with me and only with me, we had a lot of common taste and interets, books movies hobby etc. i was always confident and have a very reliable future and carrer so does she, just 2 of us always stayed at night just to talk and she told me a lot of daily routines of hers and future plans, and she justified herself a lot, also she complained me a lot, i thought we had something to start, she is single and very antisocial sometimes cold as she told me, and she dont like to talk people, except me, always telling me a lot of things about her, i was happy, she is very sick and have diabetes and she can't have children so thats why she is alone, yesterday i telled her i like her and asked her if she wanna date me, and she said "poor thing, i want to reject you gently " and she said too much age gap, life form and distance (man im not a kid anymore and we live 30min from each other..) and i will have find another girl with better nature smarter and prettier, she is the smartest girl i met and she always told me how smart and mature i am, she was the only one who laughed my corny jokes, she said she live alone because she want to be alone because of her unhealthy status and because she enjoy being alone for she's more balanced, regenerated, and then suddenly she went agressive and she told me if i can't understand her she will block me, she said she will forget this conversation and we can continue our talkings, i said when i came home from work ( im a sailor) she was the best thing that happened to me and like her. i was in the friend opt. and we said sweet dreams each other and went sleep with no argue or something, i wrote to her and she suddenly removed from her friends, that was immature we agreed, my guts says there was more..

I (24 m) was brave enough to ask her (33 f) out finally and she rejected me with poor excuses, I followed my instincts, what am I did wrong?
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