I have suspected that my girlfriend has not been faithful to me and is cheating on me. The usual flags are there, she hides the screen on her phone whenever she's on it and she bought new underwear and goes out with "the girls" a lot lately. I try my best to stay awake when she gets home but I usually end up falling asleep. Anyways last night around midnight I did stay up and hide crouched down behind my Harley waiting for her to come home. When she finally got home, she got out of her car buttoning up her blouse then took her panties out of her purse and slipped them on. It was at that moment that I noticed I have a hairline crack on my swingarm. Is that something I can weld or should I just replace the whole arm?