There's no one answer to this question - it depends on your specific situation. If you've been dating someone for a while and you're not sure what your relationship status is, it might be worth asking them directly. This can be a tricky conversation to have, but it can help to clear things up and avoid any misunderstandings further down the line.
There are a few things to consider before having this chat though. Firstly, think about how long you've been seeing each other - if it's only been a few weeks then it might be too early to have this conversation. Secondly, think about whether or not you're both on the same page with regards to commitment levels - if one of you is looking for something more serious and the other isn't, then this could lead to problems further down the line. Finally, consider your own feelings on the matter - if you're not sure what you want from the relationship yourself, then it might be worth holding off on asking your partner until you've figured that out first.
If you decide that now is the right time to ask your partner what they see for this relationship, then there are a few things you can do to make sure the conversation goes smoothly. First of all, try and approach the topic in a non-confrontational way - avoid accusing them of anything or making them feel like they need to justify their actions. Second of all, try and be as honest as possible with them about how you're feeling and what you want from the relationship - they'll appreciate your openness and it will make it easier for them to be honest with you in return. Finally, don't put pressure on them for an answer - remember that ultimately this is something that both of you will need to talk about and agree on together.