How can I end this?

Hey ladies! I've been in college for a couple of months and l've met this dude. We met up a couple of times and our friendship has turned to into a strictly sexual relationship. Everytime we link up we just have sex and everytime we text we always ONLY talk ab linking up to have sex. Apart of me feels like this isn't going to end well and also this doesn't feel healthy AT ALL...

Any advice on how can I put an end to this?