Why did he treat me this way ? thought he was a friend?

i became close friends with a guy 3 years ago and helped him loads, financially and wih work. hes always told white lies but thryve become black lies. for example 3 weeks ago he asked me to check his resume on his email and i did but also noticed emails from a girl he said was from the uk but was actually filipino. he was getting payday loans for her and besotted with her but she eventually scammed him. im hurt as ive been helping him financially and didnt know what to think. im ashamed but i looked at a lot more emails-he doesnt know but i was shocked as he told me he was going to ireland and had no money but has got more loans and told me a story that he would have to dip into his holiday fund to help an old ex but really its for him and hes hinting at me lending !!! im so angry as i really just want to tell him ive read the emails but i cant. im ashamed i did but in a way glad as i know whats going on. whats sad is ive helped him every month, never ask him to pay back. also hes distanced himself from me a lot. when i was helping him loads he was very sweet but has become cocky and arrogant. why would he treat me like this and whats the best wayto handle it ?