Can boys truly have girls as just friends?

So a cpl weeks ago my bf ran into a old friend who is a girl! He’s so pumped and happy to be in contact with her! The same day he asked me if I would want to go out and have a fun dinner with this girl and him!(We don’t often go on dates with each other) so she was busy and didn’t end up meeting up! So the other day my bf asks me what time I’m working because his friend (Girl) wants to come over and he will have her over when I’m home... he then asks me what time my lunch is .... Well she ended up coming over while I was at work after my lunch and left just before I got home! I am insacure and jealous so I need some good advice and how to deal with my feelings! I feel sad because he wants to do fun things with her and we do hang out but nothing “Fun”... he also bought her a plant when they out shopping for spice plants! At this point my jealousy and insecurity and anxiety are kicked in fully so I’m not thinking straight pls help me......❤️😊