4. Your partner is unable to set healthy boundaries.
In every relationship, there should be boundaries, and violating them is never OK — your partner has to understand this. So if you make it clear that you respect your personal space and won’t allow anybody to invade it, your partner should accept your need for privacy, even if it’s greater than theirs.
The inability to maintain those boundaries by constantly checking your phone might be the very first sign that you’ll feel uncomfortable with this person in future. As a rule, if someone doesn’t pay attention to the simple things that are actually important for you, they will be more likely to violate the emotional, physical, or any other boundaries that you set.