Jealousy
When you are jealous in your relationship, you are probably scared that you may lose your partner or their attention. You may feel insecure.
Your partner may also feel jealous.
Feelings of jealousy are normal. If the jealousy becomes very strong, it can become a problem for you or your partner.
If you or your partner react in a jealous way, try to understand what causes the jealousy. Talk with your partner about the effect of the jealousy on both of you and about your expectations and boundaries.