Can i be a vegetarian if i consume dairy products?

It really depends on your reasons for becoming vegetarian. If it's to reduce/eliminate your reliance on foods which (directly) require animals to be killed, then you might want to rethink including products containing gelatin and/or rennet. At the end of the day, it's your personal choice, but most vegetarians would not consider a diet which includes gelatin and rennet to be a truly vegetarian diet. If you really want to be vegetarian, then there are alternatives to gelatin and rennet (agar agar-based jellies/jellos, cream thickened with vegetable gums, full-fat yoghurts, cheeses made using microbial coagulants, etc.).