As usual, this is my edited version:
I have already been living in one of the hostel in Michigen University for seven months. However I felt that my room is small. It cannot occupite a sofa. Not to even mention about keeping two chairs. Moreover, my utility fees were high. Therefore, I intend to rent a unit from a condo next semester. It's a five mins walk from the condo to the library in Michigan University. Although the utility fees will be higher in the condo than in the hostel, size really matters to me. So I think that the bigger the room, the marrier.
Wo Zhu Zai Mi Xi Gen Da Xue De Su She Yi You Qi Ge Yue Le. Dan Wo Jue De Wo De Fang Jian Hen Xiao. Ta Rong Na Bu Xia Yi Zhang Sha Fa. Shen Zhi Lian Liang Zhang Yi Zi Ye Zhuan Bu Xia. Gen He Kuang, Wo De Shui Dian Fei You Fei Chang Gao. Yin Ci, Xia Ge Xue Qi Wo Yao Zai Yi Dong Gong Yu Li Zu Yi Ge Dan Wei Lai Zhu. Cong Gong Yu Dao Mi Xi Gen Da Xue De Tu Shu Guan, Wo Zhi Xu Bu Xing Wu Fen Zhong. Jin Guan Gong Yu De Shui Dian Fei Bi Su She De Shui Dian Fei Lai De Gao, Chi Cun Dui Wo Er Yan Heng Zhong Yao. Suo Yi Wo Jue De Fang Jian Hai Shi Yue Da Yue Hao!
I intend to broaden your knowledge in connectors. So I replaced many of your connectors with more difficult ones.
You can consider saying:
Bu Yao Zai Shuo Le. Ni Shi Dao Wo Hen Nan Shou.
2) The bathing part is correct. But being uncomfortable should be: '我觉得很不舒服'。Wo Jue De Hen Bu Shu Fu.
3) Use '没上学了' for the last part OR replace the sentence with '我有一星期没到学校去了'。Wo You Yi Xing Qi Mei Dao Xue Xiao Qu Le.
4) It should be: '我当然会怕被淹死啦。但是，我还是愿意陪你去游泳'。 Wo Dang Ran Hui Pa Bei Yan Si La. Dan Shi, Wo Hai Shi Yuan Yi Pei Ni Qu You Yong.
Hope these help :)