So my boyfriend had a misunderstanding and he didn't talk to me for days. He told me "bye" and that we are breaking up but after 2-3 he messaged me and said he's sorry he just got lots of problems and he'll be back after his thesis defense. Yesterday he messaged me saying he doesn't have any other girl as i keep bothering him abt it. He told me he's just busy and stressed because of his upcoming thesis defense and the fact that his phone's lcd in now broken and he has no choice but to use an old phone that's why he's not responding to lots of my messages. However, even when he told me he has no other girls i am still bothered because he's been so active in instagram which is vwey unlikely of him. I still think he's talking to some othee girl on insta cos what else would he be doing there all day?

Any advice?