Feeling jealous of boyfriend's friend
I've been with my boyfriend "Louie" almost a year. I'm very happy with him, we always have a good time together and we care about each other a lot. He has a friend "Darla" who works at a local bar/hotel. Darla has been nothing but nice to me; she calmed me down once during an anxiety attack when Louie and I went to the bar and got a room (sometimes too much noise at once freaks me out). But lately I've felt kind of jealous of what they have.
I know he doesn't love her romantically, but a couple weeks ago he called her to apologize because he wasn't able to tip her and he felt like "such a piece of ****". It's nice that he's able to apologize to her, he cares about her as a friend which is perfectly fine. however I got to thinking about how he's rarely apologized after our arguments. He loves me but he's gotten verbally aggressive when he's been drunk or aggravated about other things that have nothing to do with me, then stonewalled me afterwards. He's not physically abusive, the closest it ever got to that was grabbing me by the arm. I always apologize when I raise my voice because even though I'm not angry but trying to get a point across, I can see how I might look unstable. It just didn't seem fair that he could apologize to her so much easier than me. I feel bad for feeling that way because she's a nice person.
Pretty much my whole life I've had jealous tendencies. Mostly regarding every love interest I've had but sometimes friends too, like when I went to Zumba all the time and was close with my my instructor and she called my friend her "favorite girl". Idk where this comes from. Is it normal that I get this feeling?