Rushing a Fraternity with a friend?

Hi, so I met this guy during fall rush (im a freshman, he is a junior). We decided to rush the same houses, but it was really late into rush, so we didnt get bids anywhere. He was really built well and im a tall skinny weak kind of dude. So we decide to work out together. It was a great connection. Like I motivated him to come to the gym, while he taught me how to lift weights and what to do (we spotted each other). But during working out, we got to learn more about each other. I kept on researching about the houses and which ones I would like to join. He however just said that he would like to rush the same houses as me and join the same one. As I learned more and more about this guy, he kept telling me stories about how he slept with other women (while in a 2 year old relationship). At first, I thought he might be lying or making stuff up. But he kept on bragging about this stuff and he showed me pictures (explicit ones as well) as proof. Idk about anyone else, but I feel that while in a relationship I should be faithful to the one im dating, even if she is in a different school. She is really nice too, like comes over every weekend and makes him food and stuff. So now, I dont know what to do. He sorta expects me to rush with him, but im getting a hint that he is using me. Over the past school year, Ive been meeting people and getting info and everything in prepare for spring rush. Currently I have over 20 numbers of guys that I really like (and i feel they like me as well). I also know people that went to my high school that go to fraternities at my school and have their contact info. He on the other hand, told me that he doesnt really know a lot of people from this school (btw he transfered from a different college, so basically his first year as a junior). In addition I feel like I present myself much better while im rushing alone, because when I was with him, he would take control of the conversation and I wouldnt be able to butt in and talk about me. And whenever I did, he would butt in and continue about himself. I honestly feel like rushing with him will lead to me getting no bids from any houses. Just I dont know what to do now. He is a great workout buddy since I motivate him and he teaches me how to do stuff, but other than that? What should I do?

When he says “let’s rush the same fraternities” then you can say, “well we may have overlaps, but you should really see which are the best for you.”

And then go to the activities sometimes with out him.

Or if you go to the same activities…get him talking to some people and then go “get a drink” and then talk to other people.