Paras wants to go home before mahira

Paras was telling mahira that he should leave before her because it will be difficult. Paras and mahira are in love now because he don’t care about winning the show, he wants to leave. I was thinking he is stronger than mahira but if he thinks staying in house would be difficult without mahira, why don’t Bigg boss evict both of them together since mahira becomes weak without him and he is staying he wants to leave before her.