Why would he do THIS after 5 yrs.........*brace yourselves, this is kinda long..but I want your views! Thanks!?

He is very immature and unstable. He just does things just because you are always there. Guys will treat you like that if you let them. Never let a guy walk in and out of your life repeatedly. U should have ignored him when he called you again after 3 months. He has been stringing you along for years and you let him by always being available.