So I know that I haven't posted in awhile. I have been the happiest person ever. The guy that I always talk about told me that he likes me and that he wants to start over and consider dating. So this was like 2 days ago. So last night he randomly texts me and tells me that he can't do this anymore. I just don't understand how his feelings for me could change so fast. He didn't give me a straight up reason for why he was 'ending' things but today I found out that like 20 minutes before he told me that, he told another girl that he had feeling for her but she has a boyfriend and isn't going to break up with him. I am so confused. Should I have seen this coming and what should I do?

