Here are some red flags that should tell you to take your time:
Does it seem too good to be true?
Is there something you canīt quite put your finger on?
Do you know who this person really is?
Are they secretive or elusive regarding their past?
Have they blamed others for their problems?
Have they asked you for money or use of credit cards?
Have they given you expensive gifts early in the relationship?
Are they adamant on particular thoughts or ideas?