i think my bf is losing interest?

weve been dating a little over 7 years, i am waiting on the ring but he never gave me one yet and he says he wants to be more financially secure and acheive his goals/dreas before he can be 'ready ' for marriage.

1 yr 9 months ago he moved across the country, he is about a 1,000 miles away. Since then he has flown out to see me once.

i want him to come out to see me more. I go down there every few months or when i can afford it as i am currently out of a job. He says he cant come out to see me because of his work they wont let him have a day off. But his work gives him EVERY single weekend off!! so he could do that?

he also had his tonsils out recently and since about april of this year has used that as a reason why he cant see me

I have offered to pay for the full ticket for him and everything. I have paid my own tickets down to see him. I send cards, presents, email, skype, chocolates, etc. I try to keep things good with us

He says he loves me and wants to marry me but gets angry when i bring up marriage or the future

he always gets angry when i beg him to come visit me. Now it has been nearly a year since he has visited me. yes weve had some bumps in our relaitonship, but i feel like he has NO excuse

What do you think? i love this man but hes making me want to jump off a cliff!