Theres a lot i dont understand about hiv. such as specific routes of transmission. it makes me have a lot of health anxiety. like im afraid of touching, hugging or any physical touch. thats why i ask what are the conditions needed to transmit hiv?

Loads of information is available online; just search for terms such as "HIV transmission". However, be sure and limit such searching to professional sites like academic medical centers, public health agencies, and so on; and avoid sites run by and for infected people or those at risk (like Reddit). CDC's is among the best: https://www.cdc.gov/hiv/basics/transmission.html