Just take it easy. As I understand from your query, your dad does not stay with you guys, is rude to you, and yet says he loves you. Well, may be he does, but is unable to show it out. A lot of times, adults do things that seem really strange and stupid to all around. One explanation could be that he is under some stress or mitigating circumstance that prevents him from being the way a good father should be. However, that is no excuse to behave rudely, while professing his love and concern for you.
The best thing would be to talk to him. Communication works wonder of a number of times, and it would be a good idea to just sit across him or tell him over the phone how you feel the next time he talks to you. Make it clear that it is not enough to just say that he loves you. It has to be seen in his action and his behaviour towards you. He has to realize that his behaviour is affecting you negatively. If he still persists in behaving the same way as he was doing earlier, then you can think of what to do next. However, most of the times talking to the person and letting him or her know exactly how you feel is a great help in sorting things out.
The best thing would be to talk to him. Communication works wonder of a number of times, and it would be a good idea to just sit across him or tell him over the phone how you feel the next time he talks to you. Make it clear that it is not enough to just say that he loves you. It has to be seen in his action and his behaviour towards you. He has to realize that his behaviour is affecting you negatively. If he still persists in behaving the same way as he was doing earlier, then you can think of what to do next. However, most of the times talking to the person and letting him or her know exactly how you feel is a great help in sorting things out.