Jennifer Aniston is reportedly feeling a mix of sadness and loneliness in response to her ex-husband Justin Theroux's engagement to Nicole Brydon Bloom. Sources indicate that while Aniston wants to be happy for Theroux, she is grappling with feelings of regret and the realization that their friendship, which gave her hope for reconciliation, has now shifted permanently. Aniston's emotions are further complicated by seeing her ex-boyfriend John Mayer with a younger partner, highlighting her own struggles with finding lasting love since her divorce. Despite her heartache, Aniston is focusing on her career and seeking closure from her past relationships. Theroux, who has remained protective of Aniston, recently confirmed the engagement at the Venice Film Festival, where the couple displayed their commitment publicly. Aniston's friends have moved on to successful relationships, adding to her feelings of being 'stuck' while she reflects on the past.