If the title is BOTH ON YOUR NAME AND YOUR EX-BOYFRIEND, then I would say YOU EQUALLY OWN THE PROPERTY, that is, l/2 of it legally belongs to you and 1/2 of it legally belongs to your ex-boyfriend. I think, your ex-boyfriend since he got legally? married now, his wife has a right on your ex-boyfriend's 1/2 share of the property, unless he and his wife had a pre-nuptial agreement before they got married. Why not just talk with your ex-boyfriend to settle the problem with his wife, either donate his 1/2 share of the property or sell it to you, for you to own the whole property. If this is the case, to donate his 1/2 share of the property to you, donor's tax is 32% of the fair market value or zonal value, whichever is higher; or if to sell it to you, 6% capital gains tax (seller's obligation) and 1.5% documentary stamp tax (buyer's obligation) of the selling price or the fair market value or the zonal value, whichever is higher not mentioning the transfer tax to the municipal treasurer's office. TAKE HEED, ONLY 1/2 OF THE PROPERTY IS TO BE CONSIDERED IN COMPUTING ALL THESE TAX PAYMENT SINCE YOU OWN ALREADY THE OTHER HALF OF THE PROPERTY. Check the Tax Reform Act RA-8424 on donor's tax, capital gains tax and documentary stamp tax and the Family Code Executive Order 209 on property ownership (conjugal and exclusive).
Note: I am not a lawyer, neither an accountant, but just an ordinary person trying to share my opinion and experience that might be helpful to your problem.