If someone dallies with you, they have a romantic, but not serious, relationship with you. In the past he dallied with actresses and lady novelists. to waste time, or do something very slowly (dalier)
consider not very seriously; "He is trifling with her"; "She plays with the thought of moving to Tasmania" waste time; "Get busy--don't dally!" behave carelessly or indifferently; "Play about with a young girl's affection