Interested in a relationship but not so much in sex acts? Interested in trying some sex acts but not in a relationship?
Either way, be honest about it, and you'll be more likely to meet someone who wants the same thing.

Not interested in a relationship or in sex acts?
There's a lot more to life. Have fun with your friends and don't worry about it. When you are interested, you'll know and it doesn't matter when that is.