I was doing a quest involving Boone yesterday. I had him kill that Manny Vargas guy without having any proof that he was the one that kidnapped his wife or killed her I forget.

I was wondering if it is possible to have him as a companion now. He keeps telling me to go away. I do not want to have to restart and loose the hours I have played since then.

There's no way to get him as a follower now unless you reload an earlier save.

Crap haha

I had him kill that kind old motel lady. Hell, who know he would want proof.

Lol, funny thing is she was the one.
Maybe if you go into her safe and get the proof you can prove he did the right thing and he won't be mad?
Assuming you have the same problem as OP.

lol it tells me u wasent feeling on spending time on it and just try to rush the game lol idk it dont matter we all f***ed up on some parts lol, only thing with Boom is that if you start killing the NCR he starts to get pissed, u may end up having to brake appart if you get to a point of the game that you gona have to take out the NCR. Im at the WAR part now, and im gona either get ride of Boom, or let him go, but i got REX with me so im not alone LOL, but he could of been a good companion with you, he has been with me, and he saved my a** maney times in the game, he been with me for about 78+ hours in the game along with REX, and we kick a** lol.