I have been dating with my boyfriend (first boyfriend actually) for year and half and i have always felt little insecure about his ex.They have been dating for a year,they lost virginity to each other,but the relationship didnt end well and they didnt communicate as far as I have known. She went to college,found somebody else and broke up with him,leaving him heartbroken.When we met,he still wanted to get her back,which didnt made me feel very good because i immediately fell for him. But i respected that and waited. We built nice relationship but there always have been these little things that drove me mad. He called me once with her surname(when he was cross but in bed for gods sake),he once asked me if it is okay if she commented her picture that she smiles beautiful,that he want to met her and see how her hair looks like now (she is f.. ginger) and so on. I thought that is just some left feelings and it will go away because he claims he loves me and i feel that he do.. but kind of not fully.When we met i was seventeen and i was already decided where i want to go to college,and it was my big dream to go to particurarly this one,which is in the same city like his ex college.Everybody suported me because they have known I have worked on myslef for a long time and art college was my goal.He was really worried about it,that his another long-distance relationship wont work but i spare some money and told him i would visit him every week,which I am actually doing right now.It tooks me five hours every week to go home and much money and i wanted to be worth it. He calmed down and told me we can make it and he believes me. But recently i found his ex photo on the phone. He told me I am overreacting because i cried and wanted to go home immediately. And the day after he admited that he texted her like two weeks ago when he was drunk,that "bridges are not burned. and she could write him when she had some news ". She replied that he should leave her finally alone and that makes me think that there has been some more communication which i dont know about. I dont know what should I do,I dont feel very happy now and I also know i love him. I feel like naive idiot.
What should I do?
(Btw I am 19,my boyfriend is 24 and we see each other every weekend )