How to overcome this jealous feeling?

I’m pretty sure that I’m jealous.. Or just afraid to lose someone I’m super in love with. I love this girl and she use to show it.. She still does but its like were growing further apart.. I don’t want her to feel that she needs to be with me 24/7 because thats not it at all! I just don’t like how she may say all this stuff about other people, like how this guy was like talking about her giving him a hand j.o.b or blow j.o.b.. Like she don’t know it hurts me and I can’t just say “STOP TALKING ABOUT THAT” because then she’ll think I’m jealous, even though I may just be.. I just want her to know, I don’t want to lose her.. She tells me how happy she is to be friends again, because we got in a fight over the whole summer, and it just seems like she don’t are if were not friends anymore. I start to wonder if she means it when she says I love you.. could she just be saying that so we can still be friends and not make me feel bad? What should I do?!