Relationship

CandyGirl❤
Hello to anyone who is reading this. Kinda in needing for some advice. I've been in a relationship with my boyfriend for about 3 years going on 4 in October. We have definitely had our ups and downs throughout the years. He was in a 5 years relationship with his ex. They known each other since they're kids as you can say. His grandmother recently passed away this year. To make a long story short. I gets on facebook and I notice that on my newsfeed him and her just became friends again on each other page. He never told me that she reached out to him after knowing his grandmother passing. I feel like why keep this as a secret from me. I've no problem if she sending out her condolences but having her on your page and now she's liking your pictures.....Wouldn't you said that's kinda disrespectful towards me? I've been with this men when he had nothing to call his own and never left his side. Don't I deserve that much respect?....He recently just started his new job and now telling me how women at his job is trying so hard to get at him. I seriously don't know what to do anymore. I'm 28 years old and I'm somewhere in life that I want a real relationship, married with kids. He's 31 years old and still have a lot of growing up to do. I feel like not starting to trust him or maybe he likes the attention from other women. What should I do?