Friend came to my house and i been itching ever since, i dont see any bugs , but i have a welt on me and it itches like hell, mostly at night, but they still itch the next night after i got bite, i still dont see no bugs, maybe scabies ???

I hate to write this but you might have bed bugs, you can't necessarily see them at first. It is very common you know. I strongly recommend that you get checked, and you ay have to have the house done too. Here is an artiv=cle that may answer your questions. https://www.healthline.com/health/bites-but-no-signs-of-bugs

Scabies is more likely than bed bugs, but you will need to be examined by a dermatologist to find out for sure. If you have only one welt, it could simply be a lone bite from a rogue insect or spider.