Why do we say i definitely have no friends, but not i definitely was not at home?
have is also auxillary verb.

Because have in "I definitely have no friends" is used as main verb and not as auxiliary/helping verb. And, "I definitely was not at home" is more correct than "I was definitely not at home"

Explanation:

Usual position of adverb definitely (which is an adverb of certainty) is after auxiliary/helping verb and before main verb.

"I definitely was not at home" is more correct than "I was definitely not at home". The first sentence conveys a sense that I was not at home, with stress on I  and no clue or stress on wherever I was. However, if the speaker wants to put more stress on location/place "not at home but somewhere else" then second sentence ("I was definitely not at home") is better. It conveys I was not at home but somewhere else.

you can change by someone having a negative opinon of you in many ways for example thi can lead to depression and taking of ones life also known as sucide this effects there self esteem and ego in a negative way making them feel sad depressed and stressed causing them to act gloomy and sad if this continuses this can lead to self harm or much worse things.

hope i .

lets none because you provide no details.