'Have' in english has many meaning and uses.....in general 'have' means i got something.....for example 'i have got a car'........or 'i have got two sisters'......other uses of 'have' in grammar in present perfect 'have or has +been+past participle' for example 'i have been waited u since a year'........

No at all ur sentence is so complicated and wrong......u could say (she does not need this because we are with her....or she doesn't need that because we are in her side....or she doesn't need that because we're beside her....or we are beside her,so she doesn't need that.....

In english grammar ....the adjectives like example tired......when u explain ur own situation use the adj with ed.......but when u explain ur opinion about something makes u feel for example tired u will say that thing is tiring....

Feel as ur place