Problem in opting C.S in BTech.Thank u for the hlp.?

When i moved to cl XI ,I opted for CS as it is better for engg.In XI & XII i don't use to get a very good marks in CS but in XII boards I have scored 65% in CS .I have a little interest in it & don't have that much interest in other branches of BTech. Seriously tell me, should I opt for it.