Why has he stopped telling me he loves me?

I HAVE BEEN WITH MY BOYFRIEND FOR 2 AND A HALF YEARS. INITIALLY IT STARTED VERY SLOWLY WHICH WAS FINE BY ME AFTER 3 MONTHS TOGETHER I WAS IN LOVE AND HAD TOLD HIM BUT HE HADN’T TOLD ME THEN I WENT HOME FOR A WEEK WITHOUT HIM AND HE MISSED ME SO MUCH THAT HE PAYED 200 QUID FOR A FLIGHT OVER TO SEE ME FOR A DAY WHILST HE WAS ON HIS WAY HE TOLD ME FOR THE FIRST TIME THAT HE LOVED ME WHICH I THOUGHT WAS SO SWEET. AFTER THAT HE TOLD ME ALL THE TIME AND HE SPENT MOST NIGHTS AT MY PLACE BUT HE DIDN’T TELL HIS MUM ABOUT ME FOR THE FIRST YEAR OR SO. THIS IS BECAUSE HE THOUGHT SHE WOULD NOT APPROVE BECAUSE I WAS NOT A CHRISTIAN. AT FIRST THE IDEA OF GOING TO CHURCH FREAKED ME OUT BUT BECAUSE I LOVED HIM I WENT TO CHURCH AND MET HIS MUM AT THE SAME TIME AND SHE LIKED ME.THAT WAS A YEAR AGO AND SINCE THEN HE HASN’T STAYED AT MINE OR TOLD ME HE LOVES ME. IF I ASK HIM IF HE LOVES ME HE SAYS SOMETHING STUPID LIKE ‘ WHEN YOUR BAD ‘ OR SOMETIMES HE SAYS ‘ OF COURSE’ BUT IF I SAY TO HIM ‘I LOVE YOU’ HE SAYS ‘WELL DONE’ WHICH I FIND UPSETTING. I AM FEELING MORE AND MORE LIKE HE IS ONLY WITH ME TILL HE FINDS SOMEONE BETTER. I AM 28 YEARS OLD, OVER WEIGHT, IN A DEAD END JOB AND ALL MY FRIENDS ARE MARRIED WITH KIDS WHICH MAKES IT WORSE AS I FEEL LIKE A FAILURE. WHY WOULD ANYONE WANT TO BE WITH ME. I’VE TRIED TALKING TO HIM ABOUT IT BUT HE JUST LAUGHS IT OFF LIKE IT’S NOT IMPORTANT, BUT IT IS VERY IMPORTANT TO ME. I AM HIS FIRST LONG TERM GIRLFRIEND AND HE IS QUITE RELIGIOUS. WE HAVE BEEN BROUGHT UP IN COMPLETLY DIFFERENT WAYS HIM HAVING BEING BROUGHT UP IN A CHRISTIAN WELL OFF FAMILY AND ME FROM A NON RELIGIOUS WORKING CLASS FAMILY. WE WERE SO IN LOVE HE TREATED ME SO WELL AND ALWAYS TOLD ME HE LOVED ME. I FEEL LIKE I MIGHT BE WASTING MY TIME AS I AM NOT GETTING ANY YOUNGER I’M SCARED OF BEING LEFT ON THE SHELF. HE IS 27. HELP HELP HELP!!!!!