For those who get jealous over small things in their relationship, please answer my question.

I don't know why, but I'm becoming a more and more jealous and insecure person in my relationship. So a few days ago I went out of town to attend a wedding and my boyfriend threw a party, so there were many strangers at the club. So my boyfriend did ("Cheers before a drink") with a girl. And I felt jealous. Or should I feel jealous, please tell me. If you were in my place, would you also have Jealous? [I have a request, please don't make fun of my insecurities in the comment section.]