Why would a guy still be attached after 4 years? is this normal?

Anonymous
So my crush still likes his ex and she does not want him. So the dated for a short while in 2016-2017 (on and off for nearly 1y5 months) and parted ways, he could not move on (she was his first girlfriend) he wanted to get back and she took him back, she is the sort of girl who needs excitement, hang out and flirt with other guys. My crush started feeling insecure and was venting out his anger a lot. Ultimately after 4 months she kicked him out and my crush could not digest and returned home. the following year he went on a family trip to Europe and faked dates with the girl twice, invited her to hang out with his family when the girl had a boyfriend already.
My crush even planned a trip since the girl really wanted to go she took a male friend (who she was hanging out with when they broke up).
The following year he met me, he appeared really interested, sent me a love song (I was interested too) but when I asked him about his relationship status he mentioned that girl. Actually he was mentioning her quite a lot so i knew something was wrong. It did not took me long to realize that he was in pain. I have been with him as his mate and lover supporting him to move on. Recently a situation arose and he lied to his parents about me. why would a guy still be attached after 4 years? is this normal?
Why would a guy still be attached after 4 years? is this normal?
4 Opinion