1. In India there is no legal restraint in inter religious marriage.
2.in other words you can marry a muslim boy.
3. You can marry him by registering your marriage under Special Marriage ACT.
4. If you register the marriage under Special Marriage Act then you need not change your religion.
5. if you covert to Muslim then the marriage would be registered under Muslim Sharia law.
6. Similarly if he coverts to Hinduism Then marriage can be registered under Hindu Marriage Act.
7.Only in Special Marriage Act neither of you is required to change your religion.