How to clear misunderstandings with my boyfriend

Iam in a serious relationship since 18 months. Im 20 and my boyfriend is 21. We know each other from school but our relationship started only when we went to different colleges. So its basically a long distance relationship, wid we being able to meet once in only 4 5 months. That too for a very short time . Say 3 4 hours. . But that doesnt matter because we stay in touch throught mis calls and sms all day.. I mean every 15 20 min we exchange a msg. Even if we are in class or lab, we manage to sneak out miss calls and msges.. I like it that we're so much in touch..

But I feel that since a couple of months.. We 're not communicating well.. We talk a lot. But.. Im not able to satisfy him emotionally. he gets frustrated very quickly if I dont reply to his miss call or msg immediately. These days he's doing his internship abroad. So we get to meet only online with my internship as well. Both of us have access to net only in office and lab. So its sometimes frustrating because we're not able to give the time to each other.

I know one thing, and that is.. He loves me very very much. I can not imagine a future widout him. But lately, as I said, all the little things that I do for him, backfire.. And he feels hurt. And then im not able to convince him or something. I start crying and he melts seeing me crying and the fight is over for the day.. I dont touch the issue again but these little things have accumulated a lot.

Today was especially a bad day. I don't know how to come close to him again and make him feel im his old little girl only..

You must tell him how you feel and find out how he feels. Just be yourself and talk to him and listen.

yes.. thats what im trying to do all along.. but I don't think im successful... guys dont open up quickly I suppose?