A group of friends are talking about how each member of their group is getting married one by one. One of the group says the following line of a still single friend who has just had a woman flirt with him:
兄ちゃんに色目使ったって、相手にされないよ、どうせ
Is the translation:
She is making amorous glances at brother but he still does not have a partner.
How do you tell when 相手 is partner or opponent?