The precap:-
Blinded by his brotherly love, Lakshya had promised Dadi a secure future for Ragini but when the fog hazing his mind got cleared, he understood his blunder of taking Dadi's bait. 😕He tried to rectify it by confessing his love to Swara and again promising her a future. Thus, in his haste, he did the grave mistake of overlooking Swara's sisterly love, resulting in him getting a slap from her.
Things have already taken a turn for the worst where Ragini had started dreaming of a beautiful tomorrow with Lakshya who is busy getting things back on tract leaving a guilt-ridden Swara for being unable to provide her sister the happiness she deserves.
-My Take on Lakshya's Spontaneous Decisiveness -
Lakshya is in a critical state of absolute vulnerability where his heart is sandwiched between brotherly affection for Sanskaar and passionate adoration for Swara, each course leading to his ultimate destruction. His inclination for Swara will lead to him losing his brother forever while trailing behind his brother by tying knot with Ragini will mean destroying two lives and sacrificing his only means to have a happily forever after with Swara. We saw his futile attempt to balance both the situations at hand by agreeing to Dadi's condition and then confessing his love to Swara in the precap.
Even Somi could understand his condition as he lay tangled in the web of most crucial decisions. I won't be decisive of his actions neither will criticize his judgment right at the moment but this course of changes in the show is somewhat catastrophic.😔