It may not be wise to keep dating this person if you are uncomfortable with the fact that they are in an open relationship.
You may feel as though you can handle it to some extent right now.
However, if you are already uncomfortable with this, there is a good chance that you will become that much more uncomfortable as time progresses.
You may easily find yourself developing feelings for this person the longer you are dating them.
However, they may never develop feelings for you.
If they have been in an open relationship while dating you for any significant amount of time, there is a good chance that they are also looking to be in the same kind of relationship with you.
This may be someone who is simply not looking to settle down with anyone at this time.
No matter how well your interaction has been going with them, there is no guarantee that you will be the one who will get them to settle.
As long as they have someone else that they are also dating, their time will always be divided between seeing you and the other person that they are in an open relationship with.
This often means that they will never be able to truly give you their undivided attention.
Hence, they will have limited emotional availability to you, if any.
Meanwhile, being that this is the only person that you are dating, all of your focus will be on them.
Hence, it will be a lot easier for you to begin to develop much stronger feelings for this person as time goes on.
It wouldn’t be a good place to be if you let yourself fall for someone who isn’t open to being with you and only you.
This is why you really need to assess whether dating this person who is in an open relationship is a good idea for you.
Can you truly picture yourself being with this person over a long-term basis while allowing this open relationship to persist?
If the fact that this person that you are dating is in an open relationship bothers you at the moment, there is a good chance that you will continue to be bothered.
If this is a person that you would like to have a committed relationship with, this is the time to ask them about whether they are able to date you and no one else.
You shouldn’t be afraid to ask this question.
If you don’t, you are the one who will most likely end up being hurt by continuing to date this person.
If they tell you that they aren’t sure about whether they can commit to you and only you, it may be best to stop dating this person.
If you are a one-lover-at-a-time type of person and you have been that way your whole dating life, it would be very difficult for you to handle the fact that this person is not only seeing someone else but sleeping with them.
For the sake of your your mental well-being and precious time, it is best to talk to this person honestly about what you want and find out what they want.
Anything short of a commitment to you and no one else should be reason enough to leave them.