No one can stop you from having an abortion, sweetie. He may not support you in your choice, but it
is your choice. He can't force you to keep a pregnancy if you're not willing to do so.
But this is all premature. You should find out first if you're pregnant, and then go from there. If your period is late, a home pregnancy test should be accurate. Remember to read the directions completely
before taking the test, and remember to read the results within the time limit. If you read the results after the time limit is up, there might be an evaporation line which could look like a false positive.
For best results, wait until first thing in the morning to take the test. Your urine will be concentrated from sitting in your bladder all night, and if you truly are pregnant, the pregnancy hormone hCG will be more likely to trigger a positive on the test.
Good luck, and please let us know how things turn out. We're here for you.