1. Can you communicate clearly?
When you start to build an NSA relationship with someone, it's critical that you and them communicate clearly. Before you go to bed, make sure you all know what happened. You need to take care of each other, even if you don't fall into romance. Make sure you all know what's going on between you and set rules for that relationship. In this way, each of you can get what you want in it, and when the relationship ends, you can leave happily.
2. Find out what you want
Before you have sex with your new friend, be sure to ask yourself what you really want from this person. If you think you want to have a romantic future with them, stay away from the relationship and let your true feelings be known. In the most practical case, having a tinder free hookup doesn't turn into a serious dating relationship. If you like people who have this relationship with you, step back and protect your heart.
3. Can you spare time for this relationship?
The NSA relationship is not about replacing dating, it's about meeting basic sexual needs. If you're too busy to take the time to say good things to your friends, you may want to reconsider the relationship, especially if dating is important to you. A friend of interest should promote your love life, not belittle it.
4. Do you long for emotional comfort from your friends?
Tell your friends as honestly as you can what benefits you will get. It's normal and natural to expect your friend's support, but it's not your general friendship. If you feel very moved to call him after a bad day, try to check his impulse. Of course, you can build relationships with your friends, but clear boundaries are so important.
5. Is your relationship with this friend complicated or simple?
If you two have had a relationship in the past, or one of you has had a relationship, or your relationship as a friend has been very tense, don't let yourself fall into a situation of interest with this person. Of course, conflict and drama may make the whole thing look sexier, but as I mentioned above, the boundaries of this relationship are crucial.