Attachment and jealousy problems

Tiffany
Hey girls, I just want to know if there are tips on not being needy and jealous towards my guy. 
We don't live together and are consider having long distance at the moment. I feel extremely needy when ever we meet up. I just want to stop being needy including text or calling him too much.
I used to have a really bad Jealousy issue that I always picture guys doing things behind my back. I can't trust them because I'm always the one getting hurt. I know my guy likes those porn stars on his IG and I know I shouldn't but it really makes me sad seeing him fantasizing being with that girl instead of me. Sometimes it makes me feel like I'm not good enough for him. He said he likes me the way I am, but the gap between me and his fantasy is not small. I wonder if he lies or he meant what he said, I couldn't tell at all. Please help me 😞